Daikin FDMR50TVMG, Руководство по обслуживанию

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Troubleshooting for Outdoor Unit SiSG121917E
165 Part 6 Service Diagnosis
Reference
7.20 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 °C.
 The error is cleared when the radiation fin temperature drops below B °C
 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 is not applied properly on the radiation fin after replacing the outdoor unit
PCB.
Troubleshooting
Check No.17 Refer to P.176
A (°C) B (°C)
50/65/80 class 90 84
90 class 100 90
Caution
T u rn off the po w er. Then, t u rn on
the po w er to restart the system.
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.
(R22540)
N O
N G
OK
N O
YES
Check the radiation fin
temperat
u re.
N O
YES
YES
A b o v e A °C?
Check No. 19
Check the o u tdoor fan.
Error displayed again?
Has the PCB b een
replaced?
Check if silicone grease is
applied properly on the
radiation fin. If not, apply
the silicone grease.
Replace the o u tdoor u nit
PCB (main PCB).
Replace the o u tdoor fan
motor.
Correct the connectors and
fan motor leads.
Replace the o
u tdoor u nit
PCB (main PCB).
YES
N O
Radiation fin dirty?
Clean u p the radiation fin.
Check the installation
condition.
Go to
Check No. 17 .