TZ-3 TOTALZONE® ZONE CONTROL PANEL
13 68-0223-2
Table 5. Troubleshooting.
Symptom Possible Cause Action
No LEDs are Illuminated No
ower to the board. Check for 24 Vac
±10%
across TR1 and TR2
Shorted wire. Check fuse. If hot, a short exists in thermostat, dam
er,
or Zone-A-Lone wirin
.
Dam
er LEDs on, but no
other LEDs illuminated.
Insufficient volta
e. Check for 24 Vac
±10%
across TR1 and TR2.
Incorrect confi
uration. Check
um
ers and DIP switches for correct
confi
uration.
Erratic O
eration Emer
enc
Heat switch on. Turn off
down
Emer
enc
Heat switch.
Zone-A-Lone Feature on. Turn off
u
Zone-A-Lone.
Heat
um
o
erates
incorrectl
or not at all.
Incorrectl
wired. Verif
that W1 and Y1 e
ui
ment terminals are
um
ed.
Incorrectl
confi
ured. Verif
DIP switches 6 and 7 are correctl
set for the t
e
of thermostat used.
Heat LED flashin
. Hi
h limit reached. LED sto
s flashin
with ten-de
ree fall.
Cool LED flashin
. Low limit reached. LED sto
s flashin
with ten-de
ree rise.
Idle LED flashes five times
on bootu
.
ZMS
roblem or not
connected.
Verif
that ZMS
if an
is connected, and wired
correctl
.
Idle LED flashes
continuousl
ZMS failure. Check for dc volta
e across TL terminals:
If 0 volt = short.
If 1 volt = o
en.
If .2 to .8 volt = normal.
Add-A-Zone not o
eratin
. Incorrectl
confi
ured. Verif
DIP switch settin
s on the TAZ
anels.
Incorrectl
wired. Check AZ1and AZ2 for correct wirin
.
Be sure that AZ1 and AZ2 are at least 12 in. from line
volta
e wirin
.
Be sure the transformers are in-
hase.
