7) In case compressor will not turn.
– 59 –
• Defective AR
22
relay
• Line breakage or poor contact on 7E
line or GND line of power box
terminal block 7C to AR
22
coil 7E line
• MS
1
or MS
2
solenoid switch is
defective.
• Line breakage or poor contact on MS
1
or MS
2
solenoid switch coil R
3
or R
4
,
or S line (including )
Inspect and repair motor.
Is AR
1
or relay excited?
NO
YES
YES
BR line, wire breakage or poor
connector contact between
controller and relay box (AR
1
)
Is 24V measured
at AR
1
coil BR line?
NO
YES
Defective controller
• Defective AR
1
relay
• LR line breakage or poor connector
contact on the way of AR
22
coil (7E) to
power box terminal block 7CE, 7C to
relay box AR
1
Is 0.5V
or less measured at
terminal No.
O
of
controller?
NO
Is AR
22
relay
excited?
NO
Is electromagnetic
switch MS
1
or MS
2
excited?
NO
YES
YES
Compressor does not run.
