Daikin 4MXL-T Series User Manual

SiUS121827E Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis 227
7.18 Radiation Fin Temperature Rise
Error Code L4
Outdoor Unit LED
Display
A j 1 h 2 h 3 h 4 i 5 h
Method of Error
Detection
A radiation fin temperature rise is detected by checking the radiation fin temperature with the
compressor on.
Error Decision
Conditions
 The radiation fin temperature with the compressor on is above A.
 The error is cleared when the 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
70°C (158°F) 64°C (147.2°F)

Daikin 4MXL-T Series Specifications

General

Brand	Daikin
Model	4MXL-T Series
Category	Air Conditioner
Language	English