Honeywell TrolATemp TZ-3 TotalZone - Troubleshooting Guide; Common Symptoms and Resolutions

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