GSZH5 Service Manual
71
SERVICING
Testing Compressor Contactor
Three Phase
Using a voltmeter, test across terminals:
1. L1-L2, L1-L3, and L2-L3 - If voltage is present, proceed
to B. If voltage is not present, check breaker or fuses
on main power supply..
2. T1-T2, T1-T3, and T2-T3 - If voltage readings are not
the same as in “A”, replace contactor.
Testing Compressor Contactor
WARNING
1. Disconnect wire leads from terminals 2 and 4 of Fan
Relay Cooling and 2 and 4, 5 and 6 of Fan Relay
Heating.
2. Using an ohmmeter, test between 2 and 4 - should read
open. Test between 5 and 6 - should read continuous.
3. With power ON, energize the relays.
WARNING
Testing Fan Relay
4. Using an ohmmeter, test between 2 and 4 - should read
continuous. Test between 5 and 6 - should read open.
5. If not as above, replace the relay.
WARNING
1. Disconnect the motor leads from 6-circuit fan motor
wire harness.
2. Connect a voltmeter between circuit 3 and circuits 2
(low speed) or 1 (high speed).
3. Energize the system at low or high stage.