Curtis CGCE [5/8] Heating issues
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Curtis CGCE [5/8] Heating issues

Curtis CGCE [5/8] Heating issues
Service & Sales
1-800-421-6150
www.wilburcurtis.com
Verify 120 volts between Blu14 & WHT14
on the heating element. If yes, replace
heating element. If no, proceed to #2.
With the toggle switch turned off, remove
WHT/GRY from triac gate, and connect to
Red meter lead. Turn on toggle switch, and
place Black meter lead to Neutral and/or L1
on power block. Verify 120 volts. If yes, re-
place triac. If no, replace U.P.M.
1
2
3
HEATING ISSUES
Not heating (120 volt):
LCD reads “Heating”
4
TROUBLESHOOTING INSTRUCTIONS
Verify that the tank temperature is pro-
grammed for 200 degrees. If yes, proceed
to #2. If no, adjust accordingly.
Turn off toggle switch, and unplug the tem-
perature sensor from wiring harness. Set
dvm to read 200k ohm, and connect meter
leads to sensor connector. Sensor should
read over 100k ohm if the tank is cold, and
under 10k ohm if the tank is hot.
If the sensor is not within this range, replace
the sensor. If the sensor is within this range,
replace the UPM.
1
2
Not heating (120/220 volt):
LCD reads “Ready”
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 ele-
ments. If yes, proceed to #5. If no, verify
120 vac on the triac gate. If yes, replace the
triac. If no, replace the UPM.
Verify 9 ohm across each active heating
element, and replace any heating element
that reads “OPEN” or is “GROUNDED”
1
2
Not heating (220 volt):
LCD reads “Heating”
3
Verify that the resistance on the tempera-
ture 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
UPM.
1
2
Overheating (120/220 volt):
LCD reads “Heating”
Check across A-1 & A-2 of triac for continuity
.
If continuity is present, replace triac, if no
continuity, replace UPM.
1
Overheating (120/220 volt):
LCD reads “Ready”

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