When The Compressor Does Not Operate - Samsung APH180HD Service Manual

5-3-5 When the compressor Does not Operate

1) Trouble cause
1 When the power voltage is out of the operating range or power cable contact is bad.
2 Wrong connection or bad contact of wire. ( indoor to outdoor)
3 Main PCB defect(RY71, IC02, MICOM)
2) Check items
1 Is the power voltage normal? (AC187~AC253V)
2 Check the wireing of the outdoor and indoor unite for a wrong connection or poor contact.
3 Is the compressor waiting for 3 minutes?
4 Is the set temperature not set iower than the current temperature during the cooling operation?
5 Is the set temperature not set iower than the current temperature during the cooling operation?
Tu rn off the power, and then turn it on in 5 seconds.
Operate start/stop key to start the heating r cooling operation and
then does the relay (RY71) be on and compressor start ?
Is the output wave of pin no. 3of MICOM (IC1) high?
(Check when the compressor on.)
A re the voltage across the relay (RY71)coil DC 12V?
(Check when the compressor is on.)
Is the voltage across the electronic contactor terminal AC 187~253V?
(Check when the compressor is on.)
Replace the compre s s o r.
Samsung Electronics
N
Y
Y
Y
Y
C o m p ressor and relay are good.
N
Check the MICOM(IC01) and replace it.
N
Check IC07 (KID65003AP) and replace it.
Then check the wiring of indoor and outdoor unit for a
N
w o rng connection open.
Troubleshooting
5-7