Daikin FDMQ18WVJU9 User Manual

SiUS122226E Troubleshooting for Outdoor Unit
Part 6 Service Diagnosis 217
7.18 Electrical Box Temperature Rise
Error Code L3
Outdoor Unit LED
Display
A j 1 i 2 i 3 h 4 i 5 h
Method of Error
Detection
An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Error Decision
Conditions
 With the compressor off, the radiation fin temperature is above A.
 The error is cleared when the temperature drops below B.
 To cool the electrical components, the outdoor fan starts when the radiation fin temperature
rises above C and stops when the radiation fin temperature drops below B.
Supposed
Causes
 Defective outdoor fan motor
 Short circuit
 Defective radiation fin thermistor
 Disconnection of connector
 Defective outdoor unit PCB
Troubleshooting
R6000426
2/3/4MXS 5MXS 2/3MXL(H) 4MXL(H)
°C °F °C °F °C °F °C °F
A 100 212 70 158 100 212 70 158
B 70 158 60 140 70 158 60 140
C 85 185 70 158 85 185 70 158
Caution
YES
NO
YES
NG
NO
OK
NO
YES
Turn off the power. Then, turn on
the power to restart the system.
Check the radiation fin
temperature.
Radiation fin
dirty?
Check No. 19
Check the outdoor fan.
Error again or
outdoor fan activated?
Replace the outdoor unit
PCB (main PCB).
Clean up the radiation fin.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the outdoor fan
motor.
Correct the connectors
and fan motor lead wire.
Replace the outdoor unit
PCB (main PCB).
Above A?
Check the installation
condition.
Go to Check No. 17.

Daikin FDMQ18WVJU9 Specifications

General

Brand	Daikin
Model	FDMQ18WVJU9
Category	Air Conditioner
Language	English