Daitsu DS-9KIDR - 3. Maintenance and Troubleshooting

Air Conditioner Service Manual
38
3. Maintenance
3.1 Failure code
Code
Reason
Remark
E0
IDU & ODU Communication failure
The IDU & ODU wiring connection correct?
E1
IDU Room Temperature sensor failure.（IDU
RT failure）
IDU sensor and PCB.
E2
IDU Coil temperature sensor failure.（IDU IPT
failure）
IDU sensor and PCB.
E3
ODU Coil temperature sensor failure. (OPT)
ODU coil sensor and ODU PCB
E4
AC Cooling system abnormal
Gas leakage? 2-way or 3-way valve
blocked etc.
E5
IDU/ODU mismatched failure (specially
performance test on the production line)
/
E6
IDU PG Fan motor / DC fan motor works
abnormal（IDU failure）
Fan motor, fan blade and PCB.
E7
ODU Ambient Temperature sensor failure
ODU ambient sensor and ODU PCB.
E8
ODU Discharge Temperature sensor failure.
ODU discharge sensor and ODU PCB.
E9
IPM / Compressor driving control abnormal.
ODU PCB , compressor, etc.
EA
ODU Current Test circuit failure
ODU PCB broken?
Eb
The Communication abnormal of Main PCB
and Display board（IDU failure）
Display board and main PCB.
EE
ODU EEPROM failure.
1. ODU PCB broken?
2. Try to re-power on AC unit.
EF
ODU DC fan motor failure.
Fan motor, ODU PCB.
EU
ODU Voltage test circuit abnormal.
ODU PCB.
P0
IPM module protection.
ODU PCB
P1
Over / under voltage protection.
1. ODU PCB broken?
2. Power supply abnormal?
P2
Over current protection.
1. ODU PCB broken?
2. Power supply abnormal?
P4
ODU Discharge pipe Over temperature
protection.
Please check the troubleshooting for detail.
P5
Sub-cooling protection on Cooling mode.
Please check the troubleshooting for detail.
P6
Overheating protection on Cooling mode.
Please check the troubleshooting for detail.
P7
Overheating protection on Heating mode.
Please check the troubleshooting for detail.
P8
Outdoor Over temperature/Under temperature
protection.
Please check the troubleshooting for detail.
P9
Compressor driving protection (Load
abnormal).
Please check the troubleshooting for detail.
PA
Communication failure for TOP flow unit/
Preset mode conflict. （IDU failure）
Please check the troubleshooting for detail.
F0
Infrared Customer feeling test sensor failure.
（IDU failure）
Querying by press remote controller
F1
Electric Power test module failure. （IDU
failure）
Querying by press remote controller
F2
Discharge temperature sensor failure
PROTECTION.
Please check the troubleshooting for detail.
F3
ODU coil temperature failure PROTECTION..
Please check the troubleshooting for detail.