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Troubleshooting
332511A 17
No heat. Tripped circuit breaker. Visually check circuit
breaker for a tripped condi-
tion.
Determine cause of tripped
circuit breaker. Then repair
fault and reset main circuit
breaker.
Low power. Measure voltage across cir-
cuit breakers. Voltage
should measure between
190 and 264 Vac.
1. If voltage is lower than
expected, use electrical
schematic to locate
faulty wiring or connec-
tion.
2. Have a qualified electri-
cian service electrical
components.
Cable unplugged/loose
wire.
Check for loose or discon-
nected wires and plugs.
Attach plug/wire.
Incorrect temperature set
point.
Verify zone has a correct
temperature setting on the
controller.
Enter Setup and enter cor-
rect temperature.
Contactor not closing. Turn on heat for zone A1
and ensure contactor
closes.
1. Verify that there are no
other error conditions
that would prevent
heater from starting.
2. Replace contactor.
Problem Cause Verification Solution