Bunn Fast Cup Series Service & Repair Manual page 96

REAR PANEL
Volt/Ohm Meter - Voltage Check
Step 7: Disconnect or unplug machine from power.
Step 8: Remove right and rear panel to access
circuit boards and tank module.
Step 9: Connect power to machine.
Enter Service Technician Mode and Select
Service icon
Step 9: Select and enter the Heaters tab.
Step 10: Check for 208VAC at corresponding
Inlet, Pre-Heat or Finish Tank element.
Note: Defective heating element, entire
tank must be replaced.
Step 11: Set volt meter on 750 A/C voltage. Install
red meter lead on corresponding tank
heat element terminal and black meter lead
on the remaining heat element terminal.
Step 12: Touch the corresponding Inlet, Pre-Heat
or Finish Heater SSR button to turn on
heating element.
> Volt meter will should display 208VAC.
> Ensure temperature rises by viewing the
tank temperature on the Service Screen.
> The tank element AC current will be
shown at the bottom of the Service screen
during testing.
208VAC present but zero current or tem-
perature rise - Replace tank assembly.
No 208VAC present - First, go to Limit
Thermostat testing procedure before mov-
ing onto Solid State Relay (SSR) testing
procedure.
Volt/Ohm Meter - Resistance Check
Step 13: Disconnect or unplug machine from power.
Step 14: Remove rear panel to access tank module.
Step 15: In preparation of testing element for resis-
tance value, Isolate the tank element by
disconnecting the wires from the heater
element.
SERVICE
10
9
96
10 10
12
12
ON
12
10.8 amps
Continued >