Honeywell TOTALZONE TZ-3 - Manual (Page 13)

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