Dunham Bush Fault Codes

Fault Code Booklet R410a Non Inverter and Inverter R22 Fixed Speed

2016 Version 1.2

Products That Perform…By People Who Care

FAULT CODE BOOKLET Index

2016 Version 1.2

R22 Type Split Units High Wall Split Type

Page 1

Cassee Split Type

Page 2

Ducted Split Type

Page 3

Under Ceiling Split Type

Page 5

R22 Type Rooftop Units DBRT Rooop Type

Page 6

R410A Non-Inverter Type Split Units High Wall Split Type

Page 7


Page 8

Ducted Split Type

Page 9


Page 10

R410A Non-Inverter Type Rooftop Units DBRT Rooop Type

Page 11

R410A Inverter Type Split Units High Wall Split Type

Page 13


Page 17

Ducted Split Type

Page 20


Page 24

FAULT CODE BOOKLET R22 Fixed Speed High Wall Split

2016 Version 1.2

F Series High Wall Split Type Sensor Resistance Table

TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355

Display

Fault Descripon

DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

Ed

EEPROM error

E1

Communicaon error

E2

No over zero signal (EEPROM error)

E3

Indoor fan motor fan speed abnormal

E5

Outdoor temperature sensor abnormal/EEPROM error

Note:

E6

Room or coil temperature sensor abnormal

Indoor fan motor fan

E7

Outdoor fan motor fan speed abnormal

speed abnormal faults

P0

Over current of compressor protecon

P1

Voltage protecon

reading the feedback

P2

Compressor temperature protecon

circuit

P3

Low outdoor temperature protecon

can be caused by a faulty PC Board not or

a

faulty

indoor fan. A slow ash on the F series operaon lamp indicates that the unit is in standby mode, a quick ash indicates that the indoor coil

Fravega High Wall Split Type

temperature sensor is abnormal.

Sensor Resistance Table

TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 7.464 7.164 6.877 6.603 6.342 6.092 5.854 5.626 5.408 5.199 5.000 4.811 4.630 4.456 4.291 4.132 3.98 3.835 3.695 3.562

Display

Fault Descripon The wired controller on the F series will not

dF

Defrosng

E1

Room temperature sensor abnormal

occurs and will not

E2

Outdoor coil temperature sensor abnormal

display a fault code,

E3

Indoor coil temperature sensor abnormal

please revert to the

E4


E6


funcon

if

a

fault

display board of the unit for fault codes. The standard value for

Thermocold High Wall Split Type

the three sensors on the F series is 10k Ω at 25˚C and 5kΩ at 25 ⁰C

Display

Fault Descripon

on the Fravega and Thermocold units.

dF

Defrosng

E1


the

Room temperature sensor abnormal for second generaon

Thermocold units the


cleaning funcon has

E2 E3 E4


If CL is displayed on Fravega

been selected on the infrared remote.

Outdoor coil temperature sensor abnormal for second generaon Indoor fan motor fan speed abnormal

E5

Indoor fan motor fan speed abnormal for rst and second generaon

E6


and

Page 1 of 25

FAULT CODE BOOKLET R22 Fixed Speed Cassee Split

2016 Version 1.2

Compact Cassette Split Type DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

Note: A

slow

ash

operaon

on lamp

Indicates that the unit

Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O


Flash

Flash

Flash

O


Flash

Flash

Flash

Flash

Flash

Flash

O

O

O

O

O

Flash

Fault Descripon

Outdoor unit protecon No over zero signal/EEPROM error Water level alarm

is in standby mode, a quick ash indicates that the indoor coil temperature sensor is

Cassette Split Type Display

Fault Descripon

abnormal. The wired controller

E1


fault occurs and will

E2


not display a fault

E3


E4


E5

Pump sensor abnormal

codes.

E6

Outdoor unit protecon

The standard value for

E7

No over zero signal/EEPROM error

the three sensors is

E8

Water level alarm

will not funcon if a

code, please revert to


TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355

the display board of the

unit

for

fault

T2 Low Temperature 0⁰C 5⁰C

Cut Out Cut In

10kΩ at 25˚C. The water ow switch must

be

normally

closed if it is open it is seen as a fault. The ow switch does not

Outdoor Unit

regulate the condensaon pump and only

LED1

LED2

LED3

O

Flash

Flash Outdoor coil temperature sensor abnormal

O

Flash

O

HP/HDT switch open or ambient sensor abnormal

dry mode when the

Flash

O

O

Phase rotaon or phase failure

compressor is ener-

O

O

O


Flash

Flash

O

LP switch open

Fault Descripon

T3 High Temperature

acts as an safety . The

condensaon

pump will run connuously in cooling and

gized. The pump will run for 2 minutes stopped

and

Low Pressure Switch: High Pressure Switch:

: 150Kpa

Cut Out : 3300Kpa Cut In

of 25

Cut Out Cut In

<-7⁰C/>43⁰C >-7⁰C/<43⁰C


then switch o.

Page 2

T4 Ambient Temperature

HDT Pipe Temperature

aer the compressor have

65⁰C 52⁰C

Cut Out Cut In

: 2400Kpa

Cut Out Cut In

115⁰C 90⁰C

FAULT CODE BOOKLET R22 Fixed Speed Ducted Split

2016 Version 1.2

Ducted Split Type T2 Low Temperature 0⁰C 5⁰C

Cut Out Cut In T2B High Temperature

60⁰C 54⁰C

Cut Out Cut In

Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O


Flash

Flash

Flash

O


Flash

Flash

Flash

Flash

Flash

Flash

O

O

O

O

O

Flash

Fault Descripon


Note:

Outdoor unit protecon A No over zero signal/EEPROM error Water level alarm

slow

ash

operaon

on lamp

Indicates that the unit is in standby mode, a quick ash indicates that the indoor coil temperature sensor is

Outdoor Unit (12 000Btu to 60 000Btu) LED1

T3 High Temperature 65⁰C 52⁰C

Cut Out Cut In T4 Ambient Temperature Cut Out Cut In

<-7⁰C/>43⁰C >-7⁰C/<43⁰C

LED2

LED3

Fault Descripon

The wired controller will not funcon if a fault occurs and will


not display a fault

O

Flash

O

Flash

O


Flash

O

O


the

O

O

O


codes.

Flash

Flash

O

LP switch open


HDT Pipe Temperature Cut Out Cut In

abnormal.

code, please revert to the display board of unit

for

fault

the three sensors is 115⁰C 90⁰C

Outdoor Unit (75 000Btu to 200 000Btu)

10kΩ at 25˚C. On the 75 000Btu to

LED1

LED2

LED3

Fault Descripon

200 000Btu units the phase failure relay is wired in on ether the


TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078

Flash

Flash O

O

Flash O

O

O

Communicaons error

LP circuit or ambient

HP, LP or Coil sensor open on 150 000Btu system A

sensor circuit.

LP switch open

On the 200 000Btu

Phase rotaon protecon on 150 000Btu

double

Flash HP/HDT switch open or ambient sensor abnormal

condenser

units with communicaon error inspect

O

Flash

O


P Q E connecon,

HP, LP or Coil sensor open on 150 000Btu system B

measure

Flash

Flash

Flash Phase rotaon or phase failure

O

Flash

Flash High temperature protecon on 150 000Btu

Low Pressure Switch:


High Pressure Switch:

: 150Kpa


: 2400Kpa

between

(P to E) and (Q to E). Voltage

readings

between (P to E) and (Q to E) is between 2.5

to

2.7V

Screened cable is used.

Page 3 of 25

DC.

0.5mm

FAULT CODE BOOKLET R22 Fixed Speed Ducted Split

2016 Version 1.2

Outdoor Unit (75 000Btu to 200 000Btu) DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

LED1

LED2

On

1 quick and 1 slow ash


On



On


HDT switch open

On


Ambient temperature sensor abnormal

O


LP switch open

Flash


LP switch open 3 mes in 20 minutes

includes all errors

O


HP switch open

The Room tempera-

O



ture sensor’s range of

O



Note: Total accuracy of the MiniGen

controller

Fault Descripon


Cut Out Cut In T4 Ambient Temperature

<-7⁰C/>43⁰C >-7⁰C/<43⁰C

Cut Out Cut In

HDT Pipe Temperature 115⁰C 90⁰C

Cut Out Cut In

the MiniGen is from –30 to +100 ° C

MiniGen II, III and IIII universal controller The MiniGen controller’s room temperature

sensor

LED

Fault Descripon

dri

strongly depends on

Switch O

the operang condi-

1 ash and 1 second pause

Sensor failure

on. At room temper-


Air ow switch failure


Water ow switch failure


Communicaon failure

ature this dri is very low (< 0.05 °C can be expected). However, at

higher

DIP Switch Settings

tempera-

Switch On

DIP1 : Cooling only

Heang enabled

DIP2: 4 –way valve on in cooling

4 –way valve on in Heang

DIP3: Air ow switch

Not used

tures the dri will be worse,

mainly

because of changes in

3

mechanical stress. The MiniGen controller’s sensor can be

1.

Status Indicaon LED

extended to approxiIf the controller have power

mately 50 m, but this

1

depends enrely on

the LED will be lit , see above table for fault code sequence

ler’s room temperature

sensor’s

4

and descripon.

2 2.

Six Pole Dip Switch

operang voltage is

Used to select preferred

4.75 to 5.5V at a

sengs, see table on right for

supply

dip switch sengs

current

of

200uA.

Page 4 of 25

DIP5: Electric heang

and is funconing without fault

the applicaon. The MiniGen control-

DIP4: Water ow switch

3.

Air Flow Switch Connecon

4.

Water Flow Switch Connecon

DIP6: Compressor Lead/lag on

Not used

Reverse cycle heang Compressor lead/lag o

FAULT CODE BOOKLET R22 Fixed Speed Under Ceiling Split

2016 Version 1.2

Under Ceiling Split Type T2 Low Temperature 0⁰C 5⁰C


60⁰C 54⁰C

Cut Out Cut In

Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O


Flash

Flash

Flash

O


Flash

Flash

Flash

Flash

Flash

Flash

O

O

O

O

O

Flash

Fault Descripon


Note:

Outdoor unit protecon A No over zero signal/EEPROM error Water level alarm

slow

ash

operaon

on lamp

Indicates that the unit is in standby mode, a quick ash indicates

Outdoor Unit

that the indoor coil temperature sensor is



<-7⁰C/>43⁰C >-7⁰C/<43⁰C

LED1

LED2

LED3

O

Flash


O

Flash

O


Flash

O

O


O

O

O


the display board of

Flash

Flash

O

LP switch open

the

Fault Descripon

The wired controller will not funcon if a fault occurs and will not display a fault code, please revert to unit

for

fault

codes.


abnormal.

115⁰C 90⁰C

The standard value for Low Pressure Switch: High Pressure Switch:


Cut Out : 50Kpa


Cut In

10kΩ at 25˚C.

: 150Kpa


: 2400Kpa

If

the

display

PCB

LED’s are randomly lit or if commands send

TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355

to the unit is not received inspect

please the

display

PCB for physical damage such as water damage or damaged interconnecng cable between

main

and display PCB.

Page 5 of 25

PCB

FAULT CODE BOOKLET R22 Fixed Speed Rooop Package

2016 Version 1.2

DBRT Rooftop Package Type (18kW) DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

LED1

LED2

LED3

Flash

Flash

Flash

Flash

Flash

O

Flash

O

Flash

Evaporator coil sensor abnormal

O

Flash

Flash

Condenser coil sensor abnormal

On

Flash

Flash

Ambient sensor abnormal

O

Flash

O

Evaporator low temperature protecon

controller

Flash

On

On

Evaporator high temperature protecon

press the UP key, the

Flash

O

O

Condenser high temperature protecon

O

O

Flash


the backlight key for

Flash

On

Flash

Compressor inner LP protecon

3 seconds to clear the

On

Flash

Flash

Defrosng

Note: To

reset

the

lter

alarm clock on the KJR25B

display will blink FILT and run me. Press

Fault Descripon

Phase rotaon or phase failure HP switch, vent protecon or room sensor abnormal

clock. Ensure that dip switch SW3 is set to ON for KJR25B use and for KJR12B the dip switch

DBRT Rooftop Package Type (28kW to 88kW) Display


TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355

Fault Descripon

must be set to 1. The

phase

relay is wired the

E0


in on

E1

Condenser coil sensor abnormal in A

fan

E2

Condenser coil sensor abnormal in B

E5

Evaporator coil sensor abnormal in A

E6

Evaporator coil sensor abnormal in B

E9


EA


Eb

Wired controller output fault

P0

Over current of compressor protecon in A

P1

Over current of compressor protecon in B

P2

Over current of supply fan protecons

P3

Comprehensive protecon of condenser fan(s)

P4

HP, LP or HDT switch open in A

P5

HP, LP or HDT switch open in B

P6

HP protecon iniated in T2 evaporator, stopped condenser fan

P7

HP protecon iniated in T2 evaporator, stopped condenser

P8

Condenser high temperature protecon in A

P9

Condenser high temperature protecon in B

Pc

An-freeze protecon in A

Pd

An-freeze protecon in B

Df

Defrosng

failure

condenser

motors safety circuit.

Page 6 of 25


Cut Out Cut In



<-7⁰C/>43⁰C >-7⁰C/<43⁰C


Low Pressure Switch: Cut Out : 50Kpa Cut In

: 150Kpa

High Pressure Switch: Cut Out : 3300Kpa Cut In

: 2400Kpa

115⁰C 90⁰C

FAULT CODE BOOKLET R410A Non Inverter High Wall Split

2016 Version 1.2

F Series High Wall Split Type Sensor Resistance Table

TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355

Display


Fault Descripon

E1

EEPROM error

E2


E3


E5


E6


E7


E8


can be caused by a

E9


faulty PC Board not

EC

Refrigerant leak detecon

P0


P1

Voltage protecon

P2


on the F series will not

P3

Low outdoor temperature protecon

funcon

Note: Indoor fan motor fan speed abnormal faults

reading the feedback circuit

or

a

faulty

indoor fan. The wired controller if

a

fault

occurs and will not display a fault code, please revert to the display board of the

Fravega and Thermocold High Wall Split Type Sensor Resistance Table

TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 7.464 7.164 6.877 6.603 6.342 6.092 5.854 5.626 5.408 5.199 5.000 4.811 4.630 4.456 4.291 4.132 3.98 3.835 3.695 3.562

Display

unit for fault codes. The standard value for

Fault Descripon

the three sensors on the F series is 10k Ω at

dF

Defrosng

E1


E2


E3


E4


cleaning funcon have

E6


been selected on the

25˚C If CL is displayed on the

Fravega

Thermocold units the

infrared remote.

E4 Fault: NO

Is the fan motor voltage normal? 134V -160V AC

YES

NO

Is fan motor capacitor normal?

YES

and

PCB Failed

Replace FAC

Replace Fan Motor

Check CN8 connecon

Page 7 of 25

FAULT CODE BOOKLET R410A Non Inverter Cassee Split

2016 Version 1.2


Note: A

slow

ash

operaon

on lamp


Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O


Flash

Flash

Flash

O


Flash

Flash

Flash

Flash

Flash

Flash

O

O

O

O

O

Flash

Fault Descripon



Cassette Split Type Display

Fault Descripon


E2



E3


not display a fault

E4


E5


E6


codes.

E7



E8

Water level alarm


code, please revert to the display board of the

unit

for

fault


TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355


Cut Out Cut In

the three sensors is 10kΩ at 25˚C. The water ow switch must

be

normally

Outdoor Unit

closed if it is open it is

LED1

LED2

LED3

O

Flash


O

Flash

O


Flash

O

O


O

O

O

Phase failure (C)

O

O

Flash

Flash

Flash

O

gized. The pump will

Flash

Flash

run for 2 minutes

Flash

O

seen as a fault. The

Fault Descripon

T3 High Temperature

ow switch does not regulate the condensaon pump and only acts as an safety . The

condensaon

pump will run connuously in cooling and dry mode when the compressor is ener-

Over current of compressor protecon LP switch open

Flash High temperature protecon of outdoor unit Flash Communicaon error

aer the compressor have

stopped

then switch o.

and Low Pressure Switch:



Cut In

Page 8 of 25

: 150Kpa

Cut Out : 4800Kpa : 3200Kpa

65⁰C 52⁰C


<-7⁰C/>43⁰C >-7⁰C/<43⁰C


115⁰C 90⁰C

FAULT CODE BOOKLET R410A Non Inverter Ducted Split

2016 Version 1.2

Ducted Split Type T2 Low Temperature 0⁰C 5⁰C


60⁰C 54⁰C

Cut Out Cut In


Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O


Flash

Flash

Flash

O


Flash

Flash

Flash

Flash

Flash

Flash

O

O

O

O

O

Flash

Fault Descripon

A No over zero signal/EEPROM error Water level alarm

operaon

on lamp


that the indoor coil temperature sensor is

: 3200Kpa

Outdoor Unit (12 000Btu to 60 000Btu) LED1


Cut Out Cut In T4 Ambient Temperature

<-7⁰C/>43⁰C >-7⁰C/<43⁰C


ash

quick ash indicates

Cut Out : 4800Kpa

Cut Out Cut In

slow

is in standby mode, a

: 150Kpa

High Pressure Switch: Cut In

Note:




115⁰C 90⁰C

abnormal.

Fault Descripon

The wired controller

LED2

LED3

O

Flash


O

Flash

O


Flash

O

O


O

O

O

Phase failure (C)

codes.

O

O

Flash



Flash

Flash

O

LP switch open


Flash

Flash

Flash

O

will not funcon if a fault occurs and will not display a fault code, please revert to the display board of the

unit

for

fault

Flash High temperature protecon of outdoor unit

10kΩ at 25˚C.

Flash Communicaon error

On the 75 000Btu to 200 000Btu units the phase failure relay is


TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078

wired in on ether the


LP circuit or ambient sensor circuit.

LED1

LED2

On



On



On


HDT switch open

On



O


LP switch open

Flash


LP switch open 3 mes in 20 minutes

O


HP switch open

O



O



Fault Descripon

Page 9 of 25

FAULT CODE BOOKLET R410A Non Inverter Under Ceiling Split

2016 Version 1.2

Under Ceiling Split Type DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

Note: A

slow

ash

operaon

on lamp


Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O


Flash

Flash

Flash

O


Flash

Flash

Flash

Flash

Flash

Flash

O

O

O

O

O

Flash

Fault Descripon



New Under Ceiling Split Type Display

Fault Descripon


E2



E3


not display a fault

E4


E5


E6


codes.

E7



E8

Water level alarm



unit

for

fault


TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355


Cut Out Cut In

the three sensors is 10kΩ at 25˚C. If

the

display

PCB

LED’s are randomly lit

Outdoor Unit

or if commands send

LED1

LED2

LED3

O

Flash


age such as water

O

Flash

O


damage or damaged

Flash

O

O


O

O

O

Phase failure (C)

O

O

Flash

Flash

Flash

O

Flash

Flash

Flash

O

to the unit is not received inspect

the

display

PCB for physical dam-

interconnecng cable between

Fault Descripon

T3 High Temperature

please

main

PCB

and display PCB.

Over current of compressor protecon LP switch open

Flash High temperature protecon of outdoor unit Flash Communicaon error




Cut In

Page 10 of 25

: 150Kpa

Cut Out : 4800Kpa : 3200Kpa

65⁰C 52⁰C


<-7⁰C/>43⁰C >-7⁰C/<43⁰C


115⁰C 90⁰C

FAULT CODE BOOKLET R410A Non Inverter Rooop Package

2016 Version 1.2

DBRT Rooftop Package Type (18kW) Display


TX (⁰C) 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

KΩ 16.1156 15.3418 14.6181 13.9180 13.2631 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078 7.62411 7.29464 6.98142 6.68355

Fault Descripon


E0


E1

Condenser coil sensor abnormal T3-1

E2

Condenser coil sensor abnormal T3-2

E5

Evaporator coil sensor abnormal T2-1

E6

Evaporator coil sensor abnormal T2-2

E9


EA

Ambient sensor abnormal

KJR25B

Eb


press the UP key, the

P0

Over current protecon

P3

Comprehensive protecon of condenser fan

the backlight key for

P4

HP, LP or HDT sensor abnormal

3 seconds to clear the

P5

HP, LP or HDT sensor abnormal

P8

High condenser temperature protecon

Note: To reset the lter alarm clock on the controller

display will blink FILT and run me. Press

clock. Ensure that dip switch SW3 is set to ON for

DBRT Rooftop Package Type (28kW to 88kW)

KJR25B use and for KJR12B the dip switch

Display

T2 Low Temperature

Fault Descripon

must be set to 1. The

0⁰C 5⁰C

Cut Out Cut In



<-7⁰C/>43⁰C >-7⁰C/<43⁰C


Low Pressure Switch: Cut Out : 50Kpa Cut In

: 150Kpa

High Pressure Switch: Cut Out : 4800Kpa Cut In

: 3200Kpa

115⁰C 90⁰C

E0


E1

Condenser coil sensor abnormal in A

E2

Condenser coil sensor abnormal in B

E5

Evaporator coil sensor abnormal in A

E6

Evaporator coil sensor abnormal in B

E9


EA


Eb


P0

Over current of compressor protecon in A

P1

Over current of compressor protecon in B

P2

Over current of supply fan protecons

P3

Comprehensive protecon of condenser fan(s)

P4

HP, LP or HDT switch open in A

P5

HP, LP or HDT switch open in B

P6

HP protecon iniated in T2 evaporator, stopped condenser fan

P7

HP protecon iniated in T2 evaporator, stopped condenser

P8

Condenser high temperature protecon in A

P9

Condenser high temperature protecon in B

Pc

An-freeze protecon in A

Pd

An-freeze protecon in B

Df

Defrosng

phase

failure

relay is wired the

condenser

in on fan

motors safety circuit.

Page 11 of 25

FAULT CODE BOOKLET R410A Inverter High Wall Split

2016 Version 1.2

N, R and F series High Wall Split Type Display


Fault Descripon

T1,T2,T3 and T4

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078


Cut Out Cut In

T5 Sensor Resistance Table

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 68.66 65.62 62.73 59.98 57.37 54.89 52.53 50.28 48.14 46.11 44.08


E0

EEPROM error

E1


E2

No over zero signal

E3


E4/E6


E5/E6


E7/F5


can be caused by a

EC


faulty PC Board not

F1


F2


F3

Discharge pipe temperature sensor abnormal

F4

Outdoor EEPROM error

the three sensors on

P0

IPM or IGBT protecon

the F series is 10k Ω at

P1

Voltage protecon

P2

Compressor top temperature sensor abnormal

P3

Low ambient temperature protecon

Note: Indoor fan motor fan

Communicaon Error: Measure between N and S. Voltage readings will uctuate between negave and



or

a

faulty

indoor fan. The standard value for

25˚C

1Phase Power Supply: Min:

210VAC/50Hz

Max:

240VAC/50Hz

P-N:

277¬356 VDC

posive AC readings, if it is not uctuang in posive readings the indoor PCB must be inspected. If the voltage uctuates only in posive values the outdoor PCB must

Ref. Charging Table:

be inspected. Pipe

Refrigerant

Size

per Meter

xed in its sleeve, please note that an imbalance in R410A

1/4’’

23g per m

refrigerant due to vapour charging or gas leak can cause this fault.

3/8’’

60g per m

1/2’’

120g per m

Refrigerant Leak Detected: Check refrigerant charge, is there any gas leaks present. Ensure that T2 coil sensor is

IPM/EGBT Module Protecon: T3 High Temperature 1. 65⁰C 52⁰C

Cut Out Cut In

2.

T4 Ambient Temperature Cut Out Cut In

Check the IPM connuity from P to UVW, all readings must be equal and N

The

to UVW. Place the black test lead on P and red test lead on U, V or W. Use

charged for a 5m pipe

the red test lead for N and the black test lead for U,V or W.

run if the piping ex-

Ensure that the IPM PC board is securely installed on the heat sink, ensure that sucient heat past is used and that the heat sink is clean.

<-7⁰C/>43⁰C >-7⁰C/<43⁰C

3.

Check if the condenser fan motor rotaon is correct and if it is turning freely. Test the running capacitor of the fan motor, ensure that the macro fared reading do not exceed the allowed over/under tolerance as indicated on the


capacitor. 115⁰C 90⁰C

4.

Check compressor windings, resistance must be equal across U-V, U-W and

unit

ceeds

5m

is

use

pre -

the

table above for correct charging values. Please do not charge vapour,

only

liquid

and use a charging scale

V-W. Resistance will be between 0.5 Ω and 5.9Ω

Page 13 of 25


2016 Version 1.2

Fravega and Thermocold High Wall Split Type DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

Display

Fault Descripon

T1 and T4

E1


E2


E3


E4


E5


F1

IPM modular protecon

can be caused by a

F2

PFC modular protecon

faulty PC Board not

F3

Compressor drive abnormal

F4


F5


F6


F7

Over under voltage protecon

F8

Outdoor modular communicaon error

F9

EEPROM error

F0


FA

Sucon pipe temperature sensor abnormal

P6

Evaporator high temperature protecon



or

a

faulty

indoor fan. The standard value for the three is Ω at 25˚C


210VAC/50Hz

Max:

240VAC/50Hz

P-N:

277¬356 VDC

Ref. Charging Table:

Communicaon Error 1.

Check if the ODU main PCB board’s three LED lights all light up and o while the relay pulls in, if not it is a power supply problem.

Unit

Refrigerant

Size

per Meter

2.

20g per m

12 000 20g per m 18 000 30g per m

2.

Check the power supply it must be within 10% of the rated voltage.

24 000 30g per m

3.

Check if the IPM board is xed to the heatsink and clean.

4.

Check the IPM connuity of IPM, compressor and reactor, all readings on

is

IPM and compressor must be equal.

pre -


PFC Modular Protecon

run if the piping exceeds 5m use the

1.

Check if power supply voltage uctuates or i f the voltage is less than 135V.

table above for cor-

2.

Check whether there is any damage to the reactor and the wire connecons.

rect charging values.

3.

Check for lighng damaged on the PFC board.

Please do not charge

4.

Test the power supply of 15 V, 5 V (3.3 V) on PFC board from main PCB.

vapour,

only

liquid

Page 14 of 25

T2 and T3

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 25.01 23.90 22.85 21.85 20.90 20.00 19.14 18.13 17.55 16.80 16.05

Refrigerant Discharge Table

table below is the amount that must be recovered, do not add this amount to the factory charge !

Pipe Length

Refrigerant

1m 2m 3m 5m

240g 180g 120g 60g

If a P6 fault is displayed check for any air restricons, dirty coils, dirty

Outdoor Modular Communicaon Error



The amount of refrigerant in the Check the wiring on compressor and IPM red-U, blue-V and black-W.

unit

KΩ 18.75 17.93 17.14 16.39 15.68 15.00 14.36 13.74 13.16 12.60 12.04

displayed the ODU main PCB board is faulty.

1.

The

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

Connect the black signal line S to terminal N of ODU. Turn the unit on if 5E is

IPM Modular Protecon 9 000


1.

Check the communicaon wire between module and main control board.

2.

Check if the 5V on the module board is normal.

lters, unit is mounted to close to the ceiling or the unit is overcharged.


2016 Version 1.2

L Series High Wall Split Type Sensor Resistance Table

Display

Fault Descripon

Sensor Resistance Table T1 and KΩ T4 TX (⁰C) 20 18.75 21 TX (⁰C) 17.93 KΩ 20 22 17.1418.75 21 23 16.3917.93 22 24 15.6817.14 23 25 15.0016.39 26 24 14.3615.68 27 25 13.7415.00 28 26 13.1614.36 29 27 12.6013.74 30 28 12.0413.16 29 12.60 30 12.04

Sensor Resistance Table Sensor Resistance Table T2 and KΩ T3 TX (⁰C) 20 25.01 21 TX (⁰C) 23.90 KΩ 20 22 22.8525.01 21 23 21.8523.90 22 24 20.9022.85 23 25 20.0021.85 26 24 19.1420.90 27 25 18.1320.00 28 26 17.5519.14 29 27 16.8018.13 30 28 16.0517.55 29 16.80 30 16.05


E1

High pressure protecon

E2

An-freezing protecon

E2

Low pressure protecon

E4

High discharge temperature protecon

E5

Over current protecon

E6


E8

High discharge temperature protecon

can be caused by a

EE

EEPROM error

faulty PC Board not

EU

Decreasing frequency due to high temperature of IPM PC board

C5

Malfuncon of jumper cap

Fo

Gathering of refrigerant

F1


the sensors at 25˚C is

F2


15kΩ for T1 and T4,

F3


F4


F5


F6

Decreasing frequency due to overload

F8

Decreasing frequency due to over current

F9

Decreasing frequency due to high discharge

FH

Decreasing frequency due to an freezing

PH/PL

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 61.48 58.77 56.19 53.74 51.41 49.19 47.08 45.07 43.16 41.34 39.52

High DC voltage on bus bar/low DC voltage on bus bar protecon Over current of compressor protecon

PU

Capacitor charging malfuncon



or

a

faulty

indoor fan. The standard value for

20kΩ for T2 and T3 and 49.19kΩ for T5.


210VAC/50Hz

Max:

250VAC/50Hz

P-N:

277¬356 VDC

Ref. Charging Table: Pipe

Refrigerant

Size

per Meter

1/4’’

20g per m

3/8’’

50g per m

1/2’’

150g per m

IPM Temperature sensor abnormal/IPM PCB temperature protecon

H3

Overload of compressor protecon

H5

IPM module protecon

H6/L3

Note: Indoor fan motor fan

P5

P7/P8 T5


Indoor fan motor fan speed/outdoor fan motor fan speed abnormal The

unit

is

pre -

H7

Compressor desynchronizing fault

HC

PFC protecon

L9

High voltage protecon

ceeds

LP

Indoor-outdoor compability fault


LC

Start-up failure

U1

Compressor phase current detecon abnormal


U3

DC voltage on bus bar abnormal

vapour,

U5

Unit current detecon abnormal

U7

Four-way valve abnormal

U8

Zero -crossing circuit detecon abnormal

charged for a 5m pipe run if the piping ex5m

use

the


only

liquid


Page 15 of 25


2016 Version 1.2

L Series High Wall Split Type DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

T2 Low Temperature

Communicaon Error Measure between N and S. Voltage readings will uctuate between negave and

0⁰C 5⁰C

Cut Out Cut In

posive AC readings, if it is not uctuang in posive readings the indoor PCB must be inspected. If the voltage uctuates only in posive values the outdoor PCB must

T2B High Temperature

be inspected.

Refrigerant Leak Detected:

60⁰C 54⁰C

Cut Out Cut In

Check refrigerant charge, is there any gas leaks present. Ensure that T2 coil sensor is xed in its sleeve, please note that an imbalance in R410A refrigerant due to vapour charging or gas leak can cause this fault.

Capacitor Charging Malfuncon Check if the voltage is normal , voltage on the capacitor must be higher then 200VDC and power supply voltage bust be within 210 VAC to 250VAC. Measure the micro fared reading of capacitor and inspect the reactor.

Malfuncon Of Jumper Cap



<-7⁰C/>43⁰C >-7⁰C/<43⁰C

Check if the jumper cap is installed correctly and if it is xed ghtly on the PC board, ensure that the jumper cap is not damaged

IPM Modular Protecon 1.

Check the wiring on compressor and IPM module for loose or incorrect

T5 Pipe Temperature Cut Out Cut In

connecons. 2.

Check the power supply it must be within 210VAC to 250VAC and if DC voltage is higher then 250VDC

3.

Check if the IPM module is xed to the heatsink and clean.

Cut Out : 50Kpa

4.

Check if the condenser and evaporator coils are clean and free from

Cut In

obstructions 4.

Check the IPM connuity of IPM, compressor and reactor, all readings on IPM and compressor must be equal.

PFC Modular Protecon Check whether there is any damage to the reactor and the wire connecons. Test the capacitor micro fared reading and test if the ohm reading is around zero .

Start up failure/out of step of compressor Ensure that the wiring connecons on the compressor is correct and secure, the connecon sequence must be in a clockwise direcon. Inspect the outdoor fan connecons and check the fan capacitor micro fared readings.

Page 16 of 25

Low Pressure Switch

: 150Kpa

High Pressure Switch Cut Out : 4800Kpa Cut In

: 3200Kpa

115⁰C 90⁰C

FAULT CODE BOOKLET R410A Inverter Cassee Split

2016 Version 1.2

Compact Cassette 12 000Btu Split Type Sensor Resistance Table

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O

Coil temperature sensor abnormal

O

O

O

Flash

Flash

Flash

O

O

EEPROM error

Flash

O

O

On


Flash

On

O

O

Outdoor coil or ambient sensor abnormal

can be caused by a

Flash

On

O

On

Outdoor voltage protecon

faulty PC Board not

Flash

Flash

O

Flash

Outdoor over-current protecon

Flash

Flash

Flash

Flash

Compressor top sensor abnormal

Flash

Slow

O

O

Inverter compressor drive protecon

Flash

O

On

O

Compressor discharge sensor abnormal

Fault Descripon

T1,T2,T3 and T4

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078


Run

Water level alarm



or

a

faulty

indoor fan. The standard value for T1, T2, T3 and T4 is 10KΩ at 25˚C T5 is 54.89KΩ at 25⁰C

New Compact Cassette 12 000Btu Split Type Run

Timer

1 Flash

O

EEPROM error

2 Flashes

O


4 Flashes

O


5 Flashes

O


6 Flashes

O


discharged

7 Flashes

O


working on electrical

8 Flashes

O

Water level alarm

2 Flashes

On


3 Flashes

On


12 000Btu Condenser LED Error Codes

4 Flashes

On


LED6

LED5

Fault

5 Flashes

On


Flash

O

IGBT over current

1 Flash

Flash



2 Flashes

Flash

Over/under voltage protecon


3 Flashes

Flash


4 Flashes

Flash

Inverter compressor drive error


TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 68.66 65.62 62.73 59.98 57.37 54.89 52.53 50.28 48.14 46.11 44.08

On

On

Over/under voltage

Flash

Flash

Communicaon

New Type Condenser

Fault Descripon


210VAC/50Hz

Max:

240VAC/50Hz

P-N:

277¬356 VDC

Please insure that the DC

capacitors

are

before

components

Ref. Charging Table: 1/4’’ The

23g per m unit

ceeds

5m

is

use

pre -

the


LED2

LED1

Fault

On

Flash

EEPROM error

Flash

O

IPM/IGBT overcurrent

The water ow switch must be normally closed if it is open it is seen as a fault. The


On

On

Over/under voltage

out switch does not regulate the condensaon pump and only acts as an safety .

vapour,

O

Flash

Compressor drive

Flash

On

Compressor drive

The condensaon pump will run connuously in cooling and dry mode when the

Outdoor coms error

compressor is energized. The pump will run for 2 minutes aer the compressor have

on main to driver PCB

stopped and then switch o.

Flash

Flash


only

liquid


Page 17 of 25


2016 Version 1.2


Note: A

slow

ash

operaon

on lamp

Indicates an EEPROM error code a quick ash

indicates

Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


Flash

O

O

O

Indoor coil temperature T2 sensor abnormal

Flash

O

O

O

Indoor coil temperature T2B sensor abnormal

O

O

O

Flash

Slow

O

O

O

O

O

O

Slow

Flash

Flash

O

O

Fault Descripon

Sensor Resistance Table T1,T2,T3 and T4

Water level alarm EEPROM error Outdoor unit abnormal Indoor fan motor fan speed abnormal

that

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078

the indoor sensors is abnormal.

Cassette Split Type

The wired controller will not funcon if a

Display

Fault Descripon

fault occurs and will not display a fault

E1


E2


E3


codes.

E4



EE

Water level alarm

E7

EEPROM error

Ed

Outdoor unit abnormal


unit

for

fault

T1, T2, T3 and T4 sensors is 10kΩ at 25˚C T5 is 54.89kΩ at 25⁰C The water ow switch must

be

normally

closed if it is open it is

Outdoor Unit Display

Fault Descripon

seen as a fault. The ow switch does not

E0

EEPROM error

E2


E3

Communicaon error between IPM and main PC board

E4

Outdoor coil /ambient temperature sensor abnormal

pump will run conn-

E5

Voltage protecon

uously in cooling and

P0


P1


P2


run for 2 minutes

P3

Compressor over current protecon

aer the compressor

P4

Compressor discharge temperature sensor abnormal

P5


regulate the condensaon pump and only acts as an safety . The

condensaon

dry mode when the compressor is energized. The pump will

have

stopped

and

then switch o.

P6/E6 P7

Page 18 of 25

IPM module protecon/PFC module protecon High Evaporator temperature protecon


TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 68.66 65.62 62.73 59.98 57.37 54.89 52.53 50.28 48.14 46.11 44.08

T2 Low Temperature Cut Out Cut In

0⁰C 5⁰C

T2B High Temperature Cut Out Cut In

60⁰C 54⁰C


2016 Version 1.2

P6 Fault Code Table First Gen.

T3 High Temperature

T4 Ambient Temperature <-7⁰C/>43⁰C >-7⁰C/<43⁰C


Cut Out Cut In

LED1

LED2

LED1

LED2

LED3

On

O

On

O

On

Normal running mode

Flash

On

O

On

On

Normal standby mode

8 Flashes

On

o

Flash

On

Over current of IPM output

9 Flashes

On

On

On

On

Low voltage protecon

10 Flashes

On

On

On

On


12 Flashes

On

Flash

On

On

Control chip failure

13 Flashes

On

On

Flash

On

Zero speed of compressor

15 Flashes

On

On

Flash

On

Lack of phase or speed uctuates

Communicaon Error:

Transformer RT1

Measure between (P to E) and (Q to E). Voltage

Brown Brown Yellow Yellow

13.5 VAC 9.0 VAC

Transformer RT2 Blue Blue Blue Blue


Note:


Refrigerant

Size

per Meter

1/4’’

23g per m

3/8’’

60g per m

1/2’’

120g per m

readings between (P to E) and (Q to E) is between 2.5 to 2.7VDC. Screened 0.5mm cable must be used

The

unit

and ensure that the aluminium lm is earthed on the


unit’s body. The maximum length for communicaon


cable is 1200 m from outdoor to last indoor unit,

ceeds

5m

is

pre -

use

the

please ensure that the 120k Ω resistor is connected


14.5 VAC

across P to Q on the last unit.


14.5 VAC

P6 IPM Module Protecon:


Over current of IPM output signal

1 Phase IPM Module Posive P Negave N

Fault Descripon

65⁰C 52⁰C

Cut Out Cut In

Cut Out Cut In

Second and Third Gen.

Check the running amps of compressor and ensure wiring from IPM to compressor is correct. Test the IPM

277-356 VDC

vapour,

only

liquid

and use a charging scale .

connuity from P/N to UVW, all readings must be equal. Ensure that the neutral direcon through the CT is cor-

3 Phase IPM Module

rect. Inspect the IPM PC board is it securely installed on Main Posive P Main Negave N Posive + Negave -

the heat sink and is the heat paste sucient. Check the

535-600 VDC ±310 VDC

condenser fan motor(s) rotaon and running capacitors.

Low/High voltage protecon

LC will be displayed when the unit is running in low ambient cooling mode or alternate between running frequency and LC.

Check the commutang part assembly and IPM voltages and if all wire connecons is

Low Pressure Switch Cut Out : 50Kpa Cut In

: 150Kpa

High Pressure Switch

secure and correct, + and - on the IPM PCB is a input from the lter board.

Control chip failure Check transformer(s) input and output voltages.

Zero speed/speed uctuates or lack of phase on compressor

Please ensure that the DC

capacitors

discharged

are

before

working on electrical components.

The

Cut Out : 4800Kpa

Check wire connecons between the compressor and IPM. Check the IPM connuity

capacitors is charged

Cut In

from p to UVW, all readings must be equal and N to UVW. Ensure that the IPM PC

with 600DC volts and

board is securely installed on the heat sink and it is clean. Check the condenser fan

can

motors rotaon. Check compressor windings, resistance must be equal across U -V, U-

shock !

: 3200Kpa

cause

W and V-W. Resistance will be between 0.5 Ω and 5.9Ω.

Page 19 of 25

electric

FAULT CODE BOOKLET R410A Inverter Ducted Split

2016 Version 1.2

Low Static Ducted 12 000Btu Split Type DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


O

O

Flash

O

Coil temperature sensor abnormal

O

O

O

Flash

Flash

Flash

O

O

EEPROM error

Flash

O

O

On


can be caused by a

Flash

On

O

O

Outdoor coil or ambient sensor abnormal

faulty PC Board not

Flash

On

O

On

Outdoor voltage protecon

Flash

Flash

O

Flash

Outdoor over-current protecon

Flash

Flash

Flash

Flash


Flash

Slow

O

O

Inverter compressor drive protecon

Flash

O

On

O




or

a

faulty

indoor fan. The standard value for T1, T2, T3 and T4 is

Fault Descripon


TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

Water level alarm

KΩ 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078

10KΩ at 25˚C T5 is 54.89KΩ at 25⁰C

New Low Static Ducted 12 000Btu Split Type Run

Timer

1 Flash

O

EEPROM error

(E0)

2 Flashes

O


(E1)

4 Flashes

O


(E3)

5 Flashes

O


(E4)

before

6 Flashes

O


(E5)

working on electrical

7 Flashes

O


(EC)

8 Flashes

O

Water level alarm

(EE)

2 Flashes

On


(F1)

3 Flashes

On


(F2)

4 Flashes

On


(F3)

5 Flashes

On


(F4)


1 Flash

Flash


(P0)


2 Flashes

Flash

Over/under voltage protecon

(P1)

3 Flashes

Flash


(P2)

4 Flashes

Flash

Inverter compressor drive error

(P4)


210VAC/50Hz

Max:

240VAC/50Hz

P-N:

277¬356 VDC

Please insure that the DC

capacitors

discharged

are

components

Ref. Charging Table: 1/4’’ The

23g per m unit

is

pre -

ceeds 5m use the table above for correct charging values.

Fault Descripon


TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 68.66 65.62 62.73 59.98 57.37 54.89 52.53 50.28 48.14 46.11 44.08

12 000Btu Condenser LED Error Codes LED6

LED5

Fault

Flash

O

IGBT over current

On

On

Over/under voltage

Flash

Flash

Communicaon

New Type Condenser LED2

LED1

Fault

On

Flash

EEPROM error


The water ow switch must be normally closed if it is open it is seen as a fault. The

Flash

O

IPM/IGBT overcurrent

vapour,

ow switch does not regulate the condensaon pump and only acts as an s afety .

On

On

Over/under voltage

O

Flash

Compressor drive

The condensaon pump will run connuously in cooling and dry mode when the

Flash

On

Compressor drive

compressor is energized. The pump will run for 2 minutes aer the compressor have

Flash

Flash

Outdoor coms error

only

liquid


stopped and then switch o.

Page 20 of 25

on main to driver PCB


2016 Version 1.2

Low Static Ducted Split Type Sensor Resistance Table

Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


Flash

O

O

O


Flash

O

O

O


O

O

O

Flash

Slow

O

O

O

O

O

O

Slow

Flash

Flash

O

O

Fault Descripon

T1,T2,T3 and T4

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078

Water level alarm


Note: A

slow

ash

on

EEPROM error

operaon


Indicates an EEPROM


lamp

error code a quick ash

indicates

that


Ducted Split Type

The wired controller

Display

Fault Descripon

will not funcon if a fault occurs and will


TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 68.66 65.62 62.73 59.98 57.37 54.89 52.53 50.28 48.14 46.11 44.08

E2


E3


the

E4


codes.

EE

Water level alarm


E7

EEPROM error

Ed


code, please revert to the display board of unit

for

fault

T1, T2, T3 and T4 sensors is 10kΩ at 25˚C T5 is 54.89kΩ at 25⁰C

Display

Fault Descripon

The water ow switch must

be

normally

closed if it is open it is seen as a fault. The

0⁰C 5⁰C

T2B High Temperature Cut Out Cut In



T2 Low Temperature Cut Out Cut In

not display a fault

E1

60⁰C 54⁰C

E0

EEPROM error

E2


E3


E4


E5

Voltage protecon

pump will run conn-

P0


uously in cooling and

P1


P2


P3


run

P4


aer the compressor

P5


P6/E6 P7

ow switch does not regulate the condensaon pump and only acts as an safety . The

condensaon

dry mode when the compressor is energized. The pump will

have

for

2

minutes

stopped

then switch o.


Page 21 of 25

and


2016 Version 1.2

Outdoor Unit (68 000Btu to 200 000Btu + DBV condensers) DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

Note: For E8 error check outdoor address dial

Display

Fault Descripon

P6 protecon will displayed 60 secE0

Outdoor communicaon error

onds then disappear, aer that, press

E1

Phase sequence or failure

the check buon the amount of

E2


E4

Coil, ambient, or discharge temperature sensor abnormal

E5


E7

Discharge temperature sensor abnormal

E8

Outdoor address seng error

address sengs.

E9

Voltage malfuncon, driver module mismatching

For H2 and H3 errors

H0

Communicaon error between control chip and inverter drive chip

check

H1

Communicaon error between control chip and communicaon chip

H2

Outdoor decreasing error

interconnecng

H3

Outdoor increasing error

cable for any fault.

H7

Indoor decreasing error

H8

HP switch abnormal

readings

H9

P9 fault 3 mes in 30 minutes

between (H1 to E) and

P0 P1

switch

for

unit

correct

address

sengs and inspect H1/H2 and

connecons

Measure between (H1 to E) and (H2 to E). Voltage

(H2 to E) is between 2.5

to

2.7VDC.

Screened

0.5mm

cable must be used and ensure that the aluminium

lm

is

earthed on the unit’s

P2/H5 P3 P4/H6 P5 P6/H4

body.

P6 Debugging

mes as indicated on the wiring diagram, the digital indicator will display last saved error

Error L0 L1 L2 L4 L8

Descripon Modular protecon Low voltage protecon High voltage protecon MEC malfuncon Speed higher between front and back clock

L9

Speed higher between real and set speed

DBV Indoor Fault codes (old display) LED Status

Fault


Timer and run

Without address


All four ash

MS module and Control box is not

Low pressure protecon/P2 fault 3 mes in 30 minutes Over current of inverter compressor protecon

matched Defrost ash

EEPROM error

Compressor discharge temperature protecon/P4 3 mes in 100 min. Condenser high temperature protecon IPM module protecon/P6 3 mes in 30 minutes

Mode conict or

Timer ash


Run ash

Indoor sensors

Alarm ash

Outdoor abnormal or water level alarm

P7

Over current of xed speed compressor 1

P8

Over current of xed speed compressor 2

DBV Indoor Fault codes (new display)

sors Fault codes P3

P9

Fan module protecon

Display

Fault

and P6 will display 1

L0

Inverter module protecon

FE

Without address

H0

MS module and

For DBV units with two inverter compres-

or 2 in front of the error for example (1P3/1P6 or 2P3/2P6) For E9 1 will be sys-

L1

DC low voltage protecon

L2

DC high voltage protecon

Control box is not matched E0

Mode conict

E1


L4

MCE protecon

L5

Zero speed protecon

E2

Room sensor

L7

Phase sequence fault

E3

Coil sensor

L8

Speed dierence higher then 15Hz between front and back clock

E4

Coil sensor (T2B)

L9

Speed dierence higher then 15Hz between real and set speed

E7

EEPROM error

Ed

Outdoor abnormal

C7

PL fault 3 mes in 100 minutes

EE

Water level alarm

in front of the error

Hd

Slave unit abnormal

code

PL

Inverter module protecon

tem A and 2 system B error for example (1E9 or 2E9) For a Hd fault the number of the slave units will be displayed for

example

(2Hd)

Page 22 of 25


2016 Version 1.2

P6 Fault Code Table (18 000Btu to 60 000Btu) First Gen.

T3 High Temperature

Fault Descripon

LED1

LED2

LED1

LED2

LED3

8 Flashes

On

O

Flash

On


9 Flashes

On

On

On

On


10 Flashes

On

On

On

On


12 Flashes

On

Flash

On

On


13 Flashes

On

On

Flash

On


15 Flashes

On

On

Flash

On


65⁰C 52⁰C



<-7⁰C/>43⁰C >-7⁰C/<43⁰C


Cut Out Cut In


Note:


Refrigerant

Size

per Meter

1/4’’

23g per m

3/8’’

60g per m

1/2’’

120g per m

P6 Fault Code Table (68 000Btu to 100 000Btu) LED1

Transformer RT1 Brown Brown Yellow Yellow

13.5 VAC 9.0 VAC

LED2

Fault Descripon

8 Flashes

On

Inverter modular malfuncon

9 Flashes

On



10 Flashes

On



The

unit

ceeds

Transformer RT2

5m

14.5 VAC

Condenser DC Fan P9 Fault Code Table RED

14.5 VAC

GREEN

Fault Descripon

O

O

O

Flash

On then O

On

Drive port or signal feedback malfuncon

On then Flash

On

Lightning protecon plate malfuncon

On

On

Outdoor unit capacity seng conict

277-356 VDC

3 Phase IPM Module

Check power supply for fan module

the


±310 VDC

140 000Btu to 200 000Btu condensers and DBV condensers


LC will be displayed when the unit is running in low ambient

Cut Out : 50Kpa

Running indicator lamp of network centralized control chip. The lamp will be on if the system is running normal.

LED 3:

Malfuncon indicator lamp of network centralized control chip. The lamp will ash in three me intervals to indicate a fault on the network.

LED 4:

Malfuncon indicator lamp of inverter module. The lamp will ash if the

Cut Out : 4800Kpa

inverter module is faulty and the fault code will be displayed on the

Cut In

digital tube, please see P6 debugging table for P6 fault code.

: 3200Kpa

LED 5:

nate between running frequency and LC.

Power supply indicator lamp of network centralized control chip. The lamp will be on if the power supply is normal.

LED 2:


liquid

cooling mode or alter-

Low Pressure Switch

: 150Kpa

only

Fan module power malfuncon

535-600 VDC

LED 1:

Cut In

use


vapour, 1 Phase IPM Module

Main Posive P Main Negave N Posive + Negave -

pre -


Blue Blue Blue Blue

Posive P Negave N

is

Running indicator lamp of inverter module. The lamp will be on if the compressor is running.


capacitors

discharged

are

before


The

capacitors is charged with 600DC volts and can

cause

shock !

Page 23 of 25

electric

FAULT CODE BOOKLET R410A Inverter Under Ceiling Split

2016 Version 1.2

Under Ceiling Split Type DUNHAM-BUSH Reserve the right to change any specicaons and design without prior noce for product improvement

Note: A

slow

ash

operaon

on lamp

Indicates an EEPROM error code a quick ash

indicates

Run

Timer

Defrost

Alarm

O

Flash

O

O


Flash

O

O

O


Flash

O

O

O


Flash

O

O

O


O

O

O

Flash

Slow

O

O

O

O

O

O

Slow

Flash

Flash

O

O

Fault Descripon


Water level alarm EEPROM error Outdoor unit abnormal Indoor fan motor fan speed abnormal

that

TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 12.6431 12.0561 11.5000 10.9731 10.4736 10.000 9.55074 9.12445 8.71983 8.33566 7.97078


New Under Ceiling Split Type

The wired controller will not funcon if a

Display

Fault Descripon

fault occurs and will not display a fault

E1


E2


E3


codes.

E4



EE

Water level alarm

E7

EEPROM error

Ed



unit

for

fault

T1, T2, T3 and T4 sensors is 10kΩ at 25˚C T5 is 54.89kΩ at



60⁰C 54⁰C

Cut Out Cut In

25⁰C

Outdoor Unit Display

E0

EEPROM error

E2


E3


E4


E5

Voltage protecon

P0


P1


P2


P3


P4


P5


P6/E6 P7

Page 24 of 25

Fault Descripon



TX (⁰C) 20 21 22 23 24 25 26 27 28 29 30

KΩ 68.66 65.62 62.73 59.98 57.37 54.89 52.53 50.28 48.14 46.11 44.08

FAULT CODE BOOKLET R410A Inverter Under Ceiling Split

2016 Version 1.2

P6 Fault Code Table First Gen.

T3 High Temperature

T4 Ambient Temperature <-7⁰C/>43⁰C >-7⁰C/<43⁰C


Cut Out Cut In

LED1

LED2

LED1

LED2

LED3

On

O

On

O

On

Normal running mode

Flash

On

O

On

On

Normal standby mode

8 Flashes

On

o

Flash

On


9 Flashes

On

On

On

On


10 Flashes

On

On

On

On


12 Flashes

On

Flash

On

On


13 Flashes

On

On

Flash

On


15 Flashes

On

On

Flash

On


Communicaon Error:

Transformer RT1

Measure between (P to E) and (Q to E). Voltage

Brown Brown Yellow Yellow

13.5 VAC 9.0 VAC

Transformer RT2 Blue Blue Blue Blue


Note:


Refrigerant

Size

per Meter

1/4’’

23g per m

3/8’’

60g per m

1/2’’

120g per m

readings between (P to E) and (Q to E) is between 2.5 to 2.7VDC. Screened 0.5mm cable must be used

The

unit

and ensure that the aluminium lm is earthed on the


unit’s body. The maximum length for communicaon


cable is 1200 m from outdoor to last indoor unit,

ceeds

5m

is

pre -

use

the

please ensure that the 120k Ω resistor is connected


14.5 VAC

across P to Q on the last unit.


14.5 VAC

P6 IPM Module Protecon:


Over current of IPM output signal

1 Phase IPM Module Posive P Negave N

Fault Descripon

65⁰C 52⁰C

Cut Out Cut In

Cut Out Cut In


Check the running amps of compressor and ensure wiring from IPM to compressor is correct. Test the IPM

277-356 VDC

vapour,

only

liquid


connuity from P/N to UVW, all readings must be equal. Ensure that the neutral direcon through the CT is cor-

3 Phase IPM Module

rect. Inspect the IPM PC board is it securely installed on Main Posive P Main Negave N Posive + Negave -

the heat sink and is the heat paste sucient. Check the

535-600 VDC ±310 VDC

condenser fan motor(s) rotaon and running capacitors.

Low/High voltage protecon

LC will be displayed when the unit is running in low ambient cooling mode or alternate between running frequency and LC.

Check the commutang part assembly and IPM voltages and if all wire connecons is

Low Pressure Switch Cut Out : 50Kpa Cut In

: 150Kpa


secure and correct, + and - on the IPM PCB is a input from the lter board.

Control chip failure Check transformer(s) input and output voltages.

Zero speed/speed uctuates or lack of phase on compressor


capacitors

discharged

are

before


The

Cut Out : 4800Kpa

Check wire connecons between the compressor and IPM. Check the IPM connuity

capacitors is charged

Cut In

from p to UVW, all readings must be equal and N to UVW. Ensure that the IPM PC

with 600DC volts and

board is securely installed on the heat sink and it is clean. Check the condenser fan

can

motors rotaon. Check compressor windings, resistance must be equal across U -V, U-

shock !

: 3200Kpa

cause

W and V-W. Resistance will be between 0.5 Ω and 5.9Ω.

Page 25 of 25

electric

Dunham Bush Fault Codes

Recommend Documents