Samsung ACH1800E Technical Manual - page 161
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SAMSUNG
TROUBLE SHOOTING & ERROR MODE
7
Fault Diagnosis by Symptom
(Cont.)
● EC13 : When the trouble is found on the part related to comp of outdoor unit.
NO
YES
YES
Is the power source normal? AC220~240 50Hz
Is there no wrong connection and contact of indoor and
outdoor connection wire?
Is the compressor being delayed for 3 minutes?
Is the desired temperature set higher than the current
one during the cooling operation?
Is the desired temperature set lower than the current
one during the cooling operation?
Is the RY71 on and compressor operating
when cooling mode operates and indoor unit
PCB is shorted?
Normal
Check and replace
the related part
Check and replace
micom (IC04)
Check and replace
IC05
Replace the magnet
replay
Is the output of outdoor unit micom pin 57
high when the compressor is on?
Is the voltage across RY7 coil of
outdoor PCB 12V?
Is the output of NO. 10 of IC05 of outdoor
unit low then the compressor is on?
Is the voltage AC220V across the terminal
of outdoor unit when the compressor is on?
Replace the compressor
- Indoor unit PCB relay defect
- Output of indoor unit micom
- Comp defect
- Magnet switch defect
Check point :