Airxcel 46101-8114, Service Manual

Page: 11 / 19

NO COMPRESSOR OPERATION
-11-
115 VAC To
A/C Unit
NO
Does APU
Have Auto
Generator Start?
NO
Start Generator OR Refer To
Generator Service Manual
YES
12 VDC At Thermostat Wiring
Plug At Unit Red & Blue
NO Restore 12 VDC Red & Blue
12 VDC At Thermostat
Wiring Plus At Unit
YES
YES
12 VDC At Thermostat Wiring Plus At
Unit Yellow & Blue
NO
Check Wiring And Connectors To Plug
And Thermostat. Repair As Needed. If
All Are Good, Replace Thermostat.
YES
12 VDC At P.C.
Board Y&B
YES
115 VAC P.C. Board
Compressor Relay (COM)
Check Compressor #1 Start Relay. Check For Proper
Wiring To Compressor. Check Compressor Run
Capacitor. Check Motor Windings For Open Or Ground.
YES
NO
Check All Wiring And Connections From P.C. Board
“Y” Back To Thermostat Plug. Repair As Needed. If
Good, Low Pressure Switch Is Open, Find And Repair
Refrigerant Leak.
NO Check All Wiring And
Connections. Freeze Sensor
Open OR Replace P.C. Board.