Verify 220 volts between L1-L2 on the
power block. If yes, proceed to #2. If no,
verify that the unit is plugged in correctly,
and that the panel breaker is turned on.
Verify 220 volts between #2 & #4 on the
Manual Reset Thermostat.
If yes, proceed to #3, if no, reset or
replace the Manual Reset Thermostat.
Verify 220 volts across the Toggle Switch.
If yes, proceed to #4. If no, replace the
toggle switch.
Verify 220 volts across the Heating
Elements. If yes, proceed to #5. If no,
verify 5 VDC on the SSR. If yes, replace the
Solid State Relay, if no, replace the UCM.
Overheating:
LCD reads “Heating”
Verify that the resistance on the Temperature
Sensor is less than 10k ohms with a hot tank
(200+ degrees) If no, verify correct mounting and
that the walls of the tank are free of mineral deposits. If yes, bypass the sensor using a jumper
with a 5k ohm resistor. If the LCD reads “ready”
and the unit stops heating, replace the temperature sensor, if not, replace the UCM.
LCD reads “Ready to Brew”
Check the A.C. side of the SSR for continuity. if
continuity is present, replace the SSR, if no
continuity, replace UCM.
5
Is the water turned on?
Yes:
Yes:
No:
Yes:
No:
Verify 19 ohm across each active Heating
Element, and replace any Heating
Element that reads “OPEN”
Verify 120 volts at inlet valve coil.
Replace Inlet Valve
Remove Orange wire from the Water
Level Probe. Does the Tank Fill?
Replace Water Level Probe.
Replace UCM
TANK FILLING ISSUES
Overlling:Not lling:
Does the tank continue to fill after the
toggle switch has been turned off ?
Yes:
No:
Yes:
No:
Replace Water Inlet Valve.
Remove the Orange wire from the Water
Level Probe and connect it to ground.
Does the tank stop lling?
Replace the Water Level Probe
Replace the UCM
Service & Sales
1-800-421-6150
www.wilburcurtis.com
TROUBLESHOOTING INSTRUCTIONS - continued
BREWING ISSUES
LCD does not read “Brewing”
If the LCD reads “Ready to Brew” and no
response when Brew Button is pressed, replace
the UCM.
LCD reads “Brewing”
No water ow from the sprayhead:
Does water ow from the hot water faucet?
If yes, verify 120 volts at the dump valve coil.
If voltage is present at the dump valve coil,
replace the dump valve.
If 120 volts is not present at the dump valve
coil, conrm continuety of wiring between molex
connector and Dump Valve.
If okay, replace the UCM. (Verify the resistance
on the dump valve coil to be open in one direction, and under 2k ohm in the other direction
BEFORE REPLACING THE UCM).
If water does not ow from the hot water faucet,
replace the Water Level Probe.
*Ensure correct alignment of the sprayhead
tting and that the tubing is routed properly to
allow for maximum water ow.
Short Pots:
Verify that the Dump Valve outlet tting on the
tank, the tubing between the tank outlet and the
Sprayhead tting, the Sprayhead, and Dump
Valve are clear of obstructions.
Ensure correct alignment of the sprayhead
tting and that the tubing is routed properly to
allow for maximum water ow.
Verify that the Hot Water Tank is lling correctly.
If not, replace the Water Level Probe.
If all the above are okay, replace the Dump
Valve.
Overowing the Pots:
Ensure that the Sprayhead has not been
removed. Replace as needed.
Ensure that the Hot Water Tank is not overowing
(See Tank Filling Issues).
Ensure Cold Brew Lock is set to 5 degrees.
Ensure that Lime / Debis are not a factor If all
the above are okay, replace the Dump Valve.
*Ensure that the sprayhead is free of mineral
deposits, in good repair, and properly conected.
Wilbur Curs Co., Inc.
6913 Acco Street, Montebello CA 90640
Customer Service: 800.421.6150 | 323.837.2300
csrassistance@wilburcurs.com
Tech Support: 800.995.0417
www.wilburcurs.com
JUNE/2014 M54_TS_WC_TP_revNC
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