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10.0 DIAGNOSTICS AND TROUBLESHOOTING
10.3 Electrical Checks Flowchart
Diagnostics
NO
YES
Thermostat
Problem?
Transformer
Problem?
Go to Mechanical Checks
for Cooling or Heating
Hi Pressure Cut-Out
Hot Gas Sensor
Compressor
Time-Delay
Unit Wiring and
Connections
Start Capacitor
Potential Relay
Unit
Running?
YES
Repair and
Recheck
YES
Repair and
Recheck
NO
Voltage on Compressor
Side of Contactor?
NO
YES
Run Capacitor
NO
Voltage on Line
Side of Contactor
NO
Circuit Breakers or
Fuses Open
YES
Compressor Winding
Grounded
Outdoor Fan Motor
Grounded
Grounded Capacitor
Replace Fuses or Reset
Breakers and Recheck
System
YES
Compressor
Contactor
NO
Compressor Internal
Overload Open
Compressor Winding
Open
Unit Wiring and
Connections
Summary of Contents for A17 Series
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