TemperZone UC8 Troubleshooting Guide

Temperzone UC8 Troubleshooting Guide
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14. Fault codes shown on a room thermostat
TZT-100 room thermostat fault codes
When the UC8 is connected to a TZT-100 room thermostat and a fault is detected then the thermostat
will show the word FAULT on the display (flashing slowly). The TZT-100 room thermostat cannot
show individual fault codes.
SAT-3 room thermostat fault codes
The SAT-3 room thermostat is able to show fault codes on the thermostat display (bottom right corner
of the display). The tables provide details for the codes.
Notes:
(1) The SAT-3 display shows each fault code number twice and repeats. For example fault code
“A1 A2” is shown on the SAT-3 display as “A1 A1 A2 A2 ……” repeating continuously.
(2) Codes must be read in sequence from lowest to highest. Thus, for example, codes “A1 A2” and
“A2 A1” are the same code.
SAT-3 internal fault codes
SAT-3
display code
Fault description
Possible remedy
t1
Internal temperature sensor error
Replace thermostat
t2
External temperature sensor error
Repair external sensor connections
t3
No communications between SAT-3 and zone
controller or UC8
Repair connections between SAT-3
and zone controller or UC8
SAT-3 + Zone controller fault codes
SAT-3
display code
Fault description
Possible remedy
A1
Damper calibration not completed
Wait until dampers are calibrated
A2
Damper calibration failed
Make sure dampers operate freely
Repair damper connections
A3
No communications between zone controller
and UC8
Repair connections between zone
controller and UC8
A1 A2
Combinations of above three faults.
A1 A3
A2 A3
A1 A2 A3

TemperZone UC8 Specifications

General

Brand	TemperZone
Model	UC8
Category	Controller
Language	English