Troubleshooting - NY Thermal Trinity Lx-WH Series Installation And Operation Manual

Lx – WH Series

17.0 TROUBLESHOOTING

Observe the following precautions when servicing the water heater. Failure to comply
with these may result in fire, property damage, serious injury or death.
Servicing the Water heater

Disconnect or shut off all energy sources to the water heater: 120VAC power, water and gas.

Identify and mark wires before disconnecting or removing them.

Never bypass electrical fuses or limit devices except temporarily for testing.

Use proper personal protective equipment (PPE) i.e. eye protection, safety footwear.
These procedures should only be performed by qualified service personnel, when abnormal operation of the
water heater is suspected. The water heater incorporates a sophisticated microprocessor based control which
normally responds appropriately to varying conditions. If the water heater operation appears to be incorrect, or it
is not responding at all to a demand for heat, the following is suggested to determine and correct the problem.
Before undertaking any troubleshooting procedures it is highly recommended to have
available a digital multimeter(s) capable of measuring AC and DC volts, Amperes,
Resistance (ohms) and Continuity.
Check 120VAC and 24VAC at the Water heater
First, verify the following:

There is 120V being supplied to the water heater:
o
The circuit breaker in the electrical panel supplying power to the water heater is not tripped.
o
The service switch (if applicable) is in the ON position.

There is a heat call from the thermostat:
o
Verify 24VAC to thermostat.
o
The thermostat is placed at a sufficiently high setting to create a call for heat to the water heater.
To check for the presence of 120VAC and 24VAC at the water heater follow this procedure:

Remove the water heater front cover.

120VAC
o
Remove the Line Voltage junction box cover. First remove the #10 pan-head Phillips screw securing the
cover to the junction box. Lift the cover to release it from the water heater base and withdraw the cover
from the water heater cabinet. This will expose the Line Voltage barrier strip.
o
With an AC voltmeter set on the appropriate scale, measure the voltage across the L1 and L2 terminals
(terminals 1 and 5).
o
If 120VAC is not detected, check the electrical service as suggested above. If the service is verified,
inspect the circuit wiring from the panel to the water heater for broken or disconnected conductors.

24VAC (only check if 120VAC supply is verified).
o
Remove the Low Voltage junction box cover. First remove the #10 pan-head Phillips screw securing the
cover to the junction box. Lift the cover to release it from the water heater base and withdraw the cover
from the water heater cabinet. This will expose the Low Voltage barrier strip.
o
With an AC voltmeter set on the appropriate scale, measure the voltage across the R and C terminals
(terminals 3 and 1).
o
If 24VAC is not detected, check Fuse "C" (see below).
Installation and Operation Manual
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Trinity Lx-WH
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