Troubleshooting Instructions; Power Issues - Curtis PCGT3 Troubleshooting Manual

The LED light on the front door are not lit:
1 Verify that the panel breaker is turned on. If
okay, proceed STEP 2.
Verify that the voltage at the receptacle is
2
correct: L1-N = 120 vac, N-G = 0 vac. if
okay, proceed to STEP 3.
Verify that the toggle switch is turned on.
3
Verify 120 vac on both terminals.
No: Replace Toggle Switch
Yes: Proceed to STEP 4
Verify that there is 120 vac on both sides of
4
the Reset Thermostat, measuring between
L1-N.
Not heating:
Is the water level in the tank in contact with
the water level probe? If not, See TANK
FILLING ISSUES.
Yes: Verify 120 volts at the Heating Element. If
120 volts is present, replace the Heating
Element.
No: Verify 120 volts to the Triac Gate: If yes,
replace Triac. If no, replace UPM.
If the LCD does not read "Heating" verify cor-
rect Temperature programming, then replace
the Temperature Sensor.
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TROUBLESHOOTING INSTRUCTIONS

POWER ISSUES

HEATING ISSUES
No: Replace Reset Thermostat
Yes: Proceed to #5
5
Verify that there is 12 vac between pins 1 &
2 on the 14 pin connector at the UPM and
120 vac between pins 1 & 2 on the 12 pin
connector at the UPM.
No: Replace transformer.
Yes: Verify 5 vdc between pins 1 & 2 on the
4 pin connector at the Smart Card Module.
No: Replace UPM
Yes: Replace Smart Card Module
i If the water in the tank is not in contact
with the probe – refer to tank filling issues.
The unit will not heat until the water in the
tank has contacted the probe.
Overheating:
Does the LCD read "Heating"?
Yes: Verify that resistance on temp Sensor reads
less than 10k ohm. Verify correct mounting
to tank. Replace sensor.
No: Check Triac for continuity between A1 &
A2. If continuity is present, replace Triac. If
there is no continuity, replace the UPM.
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