TROUBLESHOOTING
Problem
Action Required
●
Supply fan not running
●
Verify that the disconnect is in the “on” position
●
Verify that door micro-switch “kill switch” is
completely depressed and operating correctly
●
Verify that thermostat / controller is not in
unoccupied mode (night set-back)
●
Check manual reset controls (electric heat, high
refrigerant pressure controls and low limit
temperature control) and ensure that they have
not been tripped.
●
Check the fan relay to observe if it is energizing
and de-energizing properly
●
Check that the 24V transformer is working
properly
●
Ensure that the wire connections are secured
properly
●
Compressor and condensing
●
Ensure that there are no obstructions
fans cycle on and off
to the condenser air path. Obstructions will cause
the unit to cut-out on high head pressure.
●
Check refrigerant charge. If the charge is to low,
the unit will cut-out on low pressure. The
Refrigerant type and amount is posted on the
silver CSA label located on the electrical enclosure
or fan housing.
-13-
Basic Trouble Shooting Guidelines
