Troubleshooting - Honeywell TrolATemp TZ-3 TotalZone Product Data

TROUBLESHOOTING

Symptom
No LEDs are Illuminated
Damper LEDs on, but no
other LEDs illuminated.
Erratic Operation
Heat pump operates
incorrectly or not at all.
Heat LED flashing.
Cool LED flashing.
Idle LED flashes five times
on bootup.
Idle LED flashes
continuously
Add-A-Zone not operating.
Table 5. Troubleshooting.
Possible Cause
No power to the board.
Shorted wire.
Insufficient voltage.
Incorrect configuration.
Emergency Heat switch on.
Zone-A-Lone Feature on.
Incorrectly wired.
Incorrectly configured.
High limit reached.
Low limit reached.
ZMS problem or not
connected.
ZMS failure.
Incorrectly configured.
Incorrectly wired.
TZ-3 TOTALZONE® ZONE CONTROL PANEL
Check for 24 Vac (±10%) across TR1 and TR2
Check fuse. If hot, a short exists in thermostat, damper,
or Zone-A-Lone wiring.
Check for 24 Vac (±10%) across TR1 and TR2.
Check jumpers and DIP switches for correct
configuration.
Turn off (down) Emergency Heat switch.
Turn off (up) Zone-A-Lone.
Verify that W1 and Y1 equipment terminals are jumped.
Verify DIP switches 6 and 7 are correctly set for the type
of thermostat used.
LED stops flashing with ten-degree fall.
LED stops flashing with ten-degree rise.
Verify that ZMS (if any) is connected, and wired
correctly.
Check for dc voltage across TL terminals:
If 0 volt = short.
If 1 volt = open.
If .2 to .8 volt = normal.
Verify DIP switch settings on the TAZ panels.
Check AZ1and AZ2 for correct wiring.
Be sure that AZ1 and AZ2 are at least 12 in. from line
voltage wiring.
Be sure the transformers are in-phase.
13
Action
68-0223-2