Avantco 178Z2FWMS Руководство по эксплуатации - Страница 7
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Service Manual
P. 7
Part Testing
Max Load
Locked Rotor Amps
Model #
Amps
(LRA)
Compressor and Capacitor
178Z1RHC
3.6 Amps
22.4 Amps
With the unit 'ON' and the controller calling for
178Z2RHC
7.2 Amps
44.1 Amps
compressor to run then:
- Check for 120 volts at main compressor plug
between the red and white wires (Fig. 8)
- Check for amperage +/- 10% on the red wire.
If amperage is above running amps and below locked
rotor amps, replace starting components. Reference
table at right for amps.
If amperage is at Locked Rotor Amps, replace
compressor.
With the unit 'OFF' and disconnected from the power
supply, disconnect wiring from the compressor. Check
resistance from common to run and start windings.
Resistance should be found using the following
equation:
Fig. 8
(Run to Start = (Run to Common) + (Start to Common))
Temperature will change resistance OHM values.
Check windings are not connected to ground by
check OHMs from each pin to shell of the compressor
(paint must be removed from the case when checking
for grounding).
Capacitor checks:
Visually check for any deformations or leaking oil-like
fluids. Replace if any are found.
Discharge capacitor prior to testing. Use a 20,000
ohm, 2 watt resistor, caution resistor will be HOT
during discharge.
Replace if micro-farads are not with +/- 10%
Fig. 9
NOTE: It is recommended that if the
compressor fails to ensure that the condenser
fan is operating correctly.