Compressor Starting Error - Samsung AM007FN1DCH/AA Service Manual

4-4-74 Compressor starting error

Outdoor unit display
∙ Startup, and then if the speed increase is not normally.
Judgment Method
∙ Detected by H/W or S/W.
∙ Compressor connection error
Cause of problem ∙ Defective Compressor
∙ Defective PCB
1. Cause of problem
Power Off and then Restart
Is Hot Gas Bypass Valve startup
the initial power is applied?
Hot Gas Bypass Valve initial
value between different phases of
compressor (U V,V W,W U)
between the body of Compressor and
connection wire properly connect to
Samsung Electronics
(INVERTER1 PCB)
(INVERTER2 PCB)
Yes
startup does it work?
Yes
Is the resistance
less than 2Ω?
Yes
Is the resistance
chassis MΩ?
Yes
Does the Compressor
the compressor?
Yes
Continue
No
Hub Replace PCB.
No
Replace Hot Gas Bypass Valve.
No
Replace Compressor.
No
Replace Compressor.
No
Check the connection wire.
Troubleshooting
4-107