77X INSTALLATION & OPERATION MANUAL
771/772/773/774 MODELS
49
Compressor Winding Resistance
Error #521, 522, 523, 524: Refrigeration Solenoid Stuck Open
Error #531, 532, 533, 534: Defrost Solenoid Stuck Open
Error #561, 562, 563, 564: Refrigeration Solenoid Not Opening
Error #571, 572, 573, 574: Defrost Solenoid Not Opening
Error #581, 582, 583, 584: Beater Motor Not Turning On
Model
C - R C - S
Copeland
ZB15KCE-PFV
0.94-1.08 2.12-2.44
Copeland
ZB19KCE-PFV
0.84-0.97 2.52-2.90
1
Verify the solenoid is not activated by going to the MANUAL ON/OFF menu. Remove wiring from
the suspect solenoid and check for 24 VAC.
Note: The voltage will read ~19 VAC when not powered.
2 If no voltage (~19 VAC), then replace the solenoid valve.
3 If 24 VAC is present, then replace the control board.
1 Remove the wiring harness from the suspect solenoid.
2
Manually turn on the solenoid using the SERVICE MENU and check for 24 VAC at the wiring harness.
Note: The voltage will read ~19 VAC when not powered.
3 If 24 VAC is present, then replace the solenoid.
4 If no voltage, then replace the control board.
1
Remove the control board and check for blown motor fuses (Motor 1: F3 & F4, Motor 2: F5 & F6,
Motor 3: F7 & F8, Motor 4: F9 & F10).
A motor or capacitor malfunction may be caused by a blown fuse.
2 If fuses are OK, reinstall control board.
3 Disconnect wiring harness from suspect beater motor.
4
Manually turn on beater motor using the SERVICE MENU and ensure there is line voltage on pins 1
& 3 of supply harness (outside pins).
5
If correct voltage is present, substitute a “known to be good” capacitor and try to operate motor
again. If no voltage is present (when activated through the menu), then replace the beater motor
power harness.
6 If motor fails to start with working capacitor, then replace both motor and capacitor.
To Next Page
Loading...
