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12
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IV - 40
4. Service procedures
6 Solenoid coil of the electronic refrigerant
control valve (ERCV) ………… Indoor unit
*Measure the coil resistance.
• Measure the resistance between No. 5 (GRY lead wire) and other terminals
(another color of lead wires) of 5P (WHT) plug connected to the solenoid coil.
Refer to “1-2-(A) Major component specifications”.
7 Compressor motor (CM) ……… Outdoor unit *Measure the coil resistance.
• In case of triple -phase compressor
Measure the resistance between “R” (RED lead wire) and “S” (WHT lead
wire) terminals, “R” and “T” (BLU lead wire) terminals and “S” and “T”
terminals on the compressor motor magnetic contactor.
• In case of single -phase compressor
Remove the cover of compressor terminal and measure the resistance
between terminals.
Refer to “1-2 Major component specifications”.
8 Compressor motor magnetic contactor (52C) ………… Outdoor unit
• Measure the resistance between A (ORG lead wire) and B (GRY lead wire)
terminals on the compressor motor magnetic contactor.
Refer to “1-3 Other component specifications”.
• Check the continuity between contactors.
MODEL
Push button on
the magnetic
contactor
no press
press
FMCA–1S / FC–1SZ607
Pair of terminals
R – U S – V T – W 31 – 32
–––– –––– –––– YES
YES YES YES ––––
9 Solenoid coil of 4-way valve (20S) … Outdoor unit
*Measure the coil resistance.
• Measure the resistance between No.1 (BLU lead wire) and No.2 (BLU lead
wire) terminals of 2P (YEL) socket connected to the solenoid coil.
Refer “1-3 Other component specifications”.