Bunn Silver JDF-4S Installation & Operating Manual page 22

TROUBLESHOOTING (cont.)
PROBLEM
Refrigeration
Dispense stations not working.
Note: Cooling failure or excessive
bath and cabinet temperatures for
more than 4 hours will result in
dispense lockout or no dispense.
Dispenser Locked Out
Dispense stations not working.
Cooling system failure.
PROBABLE CAUSE
1. Compressor ON/OFF switch.
2. Dirty condenser filter or fins.
3. Condenser fan not running.
4. Compressor relay not activating.
5. Compressor not running.
6. Compressor running and not
cooling.
1. Check Dispense Lockout switch.
1. Refrigeration or cold water recir-
culation system.
22
REMEDY
Check for "ON" position or no con-
tinuity - replace switch.
Clean filter and fins or replace con-
denser filter. (Filter not supplied on
some machines).
A) Check for 120V or 230V AC. Re-
place fan motor or check fan blades
for obstructions.
B) Check compressor LED on circuit
board. If ON, relay coil should have
power (120 or 230 VAC).
Check compressor relay coil for 120
or 230vac.
NOTE: Always check power with
coil attached. If compressor LED is
ON and no 120 or 230vac - replace
board. If yes, 120 or 230vac - re-
place relay.
Note: Relay contacts are normally
open.
Check compressor thermal overload
(N/C). If open check for dirty con-
denser filter or adequate ventilation
and space around machine.
Check refrigeration system for leaks
and proper charge.
(A) Set switch to ON position.
(B) Check switch and harness for
proper continuity.
Check all previous items that per-
tain to refrigeration or cold water
recirculation
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