Daikin FDMR50TVMG, Руководство по обслуживанию

Страница: 167 / 224

SiSG121917E Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis 162
7.18 Thermistor or Related Abnormality (Outdoor Unit)
Error Code
H9 , J3 , J6 , J8 , J9 , P4
Outdoor Unit LED
Display
A j 1 i 2 i 3 h 4 h 5 h
Method of Error
Detection
This fault is identified based on the thermistor input voltage to the microcomputer.
A thermistor fault is identified based on the temperature sensed by each thermistor.
Error Decision
Conditions
 The voltage between the both ends of the thermistor is above 4.96 V or below 0.04 V with
the power on.
 J3 error is judged if the discharge pipe temperature is lower than the heat exchanger
temperature.
 The system is shut down if all the units are judged as the J8 error.
Supposed
Causes  Disconnection of the connector for the thermistor
 Thermistor corresponding to the error code is defective.
 Defective heat exchanger thermistor in the case of J3 error

Defective outdoor unit PCB
Troubleshooting
In case of P4
Replace the outdoor unit PCB (main PCB).
P4 : Radiation fin thermistor
Caution
Be s u re to t u rn off the po w er s w itch b efore connecting or disconnecting
connectors, or parts may b e damaged.