Topaz TZ-12B, Owner'S Manual

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TOPAZ
™
Owner’s Manual
Troubleshooting Guide
Problem Cause Remedy
Unit does not run Power interruption Check external power supply. Reset LCDI cord
control. Check circuit breakers and fuses. Re-
place or reset if necessary.
Condensate tank-full (tF indicated) Empty tank
Thermostat set incorrectly Check Mode setting and temperature setpoint
vs. room temperature. Reset if necessary.
Thermostat inoperable Check for display on thermostat. Press power
switch and mode switches to determine if
thermostat responds. Replace thermostat if
necessary.
Thermostat displays error code
rE room sensor failure
FE freeze sensor failure
CF compressor failure
Fr coil freezing
tF condensate tank full
Repair or replace room sensor.
Repair or replace freeze sensor.
Check for compressor problems.
Space too cold or refrigerant level low.
Condensate tank must be emptied
Electrical Panel Problem
- 24 volt transformer defective
- Fuse blown/overload tripped (TZ-60B)
- Loose wire
- Contactor coil defective
- Contactor stuck open, burned or dirty
- Replace transformer.
- Check and replace or reset if necessary.
- Check and tighten if necessary.
- Replace contactor.
- Repair or replace contactor.
Evaporator fan runs but
compressor and con-
denser fan do not. Thermostat satisfied The evaporator runs anytime the thermostat is
on. The compressor and condenser only run if
there is a demand for cooling.
Thermostat is in the compressor start delay
mode Make sure there is a call for cooling then wait at
least five minutes for compressor to start.
Thermostat set for the wrong MODE Set MODE to COOL.
Condensate jumper plug or condensate
pump not installed Install jumper if a condensate tank is being
used. Attach pump if pump is used.
High pressure switch tripped or defective Press reset button on high pressure switch.
Replace switch if necessary.
Loose or defective wires Check for loose or shorted conductors. Secure
contact between wires and connectors. Repair
or replace as required.
Shorted or open run capacitor Replace capacitor.
Defective compressor Check for shorts, opens and grounds. Com-
pressor replacement should be done by a
service technician.