Troubleshooting
50
2.
Remove the wiring terminal block access cover from the front panel.
3.
Locate the incoming power leads at the terminal block.
4.
Expose the power leads enough to use a clamp-on ammeter.
5.
Clamp the ammeter on one of the power leads.
6.
Reconnect the power to the compressor.
7.
Start the compressor.
8.
Read the current draw for each lead, then stop the compressor.
•
A reading of 0 amperes indicates an open circuit.
•
A reading of 10 to 14 amperes (steady state) is normal.
•
A reading slightly higher than 10 to 14 amperes suggests possible minor system
problems, i.e. low-supply voltage, loose electrical connection, etc.
•
A reading of about 68 amperes indicates a mechanically locked rotor. Consult a SCAI
Service Center.
•
A reading of full scale, along with a tripped circuit breaker or a blown control circuit fuse,
means a short circuit in the chassis wiring or motor.
9.
Remove the ammeter.
10.
Replace the terminal block access cover.
Summary of Contents for HC-4E1
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Page 55: ...Troubleshooting 51 Figure 9 HC 4E1 Wiring Diagram...
Page 56: ...Troubleshooting 52 Figure 10 HC 4E2 Wiring Diagram...
Page 57: ...Troubleshooting 53 Figure 11 HC 4E1 Electrical Schematic...
Page 58: ...Troubleshooting 54 Figure 12 HC 4E2 Electrical Schematic...
Page 61: ...Parts 57 Figure 13 Parts Identification 18 21 19 13 14 20 16...