Daikin 4MXL-T Series, Руководство по обслуживанию

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Troubleshooting for Outdoor Unit SiUS121827E
226 Part 6 Service Diagnosis
Reference
Reference
7.17 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 .
Supposed
Causes
 Defective outdoor fan motor
 Short circuit
 Defective radiation fin thermistor
 Disconnection of connector
 Defective outdoor unit PCB
Troubleshooting
R6000426
Check No.17 Refer to P.240
Check No.19 Refer to P.241
A B
70°C (158°F) 60°C (140°F)
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 .