Daikin FDMQ-R Series Service Manual

SiUS091601EA Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis 176
7.14 Radiation Fin Temperature Rise
Error Code L4
Method of Error
Detection
A radiation fin temperature rise is detected by checking the radiation fin thermistor with the
compressor on.
Error Decision
Conditions
 If the radiation fin temperature with the compressor on is above A.
 The error is cleared when the radiation fin temperature drops below B.
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 60 minutes without any other error
Supposed
Causes
 Defective outdoor fan motor
 Short circuit
 Defective radiation fin thermistor
 Disconnection of connector
 Defective outdoor unit PCB
 Silicone grease not applied properly on the radiation fin after replacing the outdoor unit PCB
AB
(°C) (°F) (°C) (°F)
09 class 99 210.2 70 158
12 class 90 194 84 183.2
15 class 100 212 57 134.6
18/24 class 82 179.6 77 170.6

Daikin FDMQ-R Series Specifications

General

Brand	Daikin
Model	FDMQ-R Series
Category	Air Conditioner
Language	English