TemperZone UC8 Troubleshooting Guide

Temperzone UC8 Troubleshooting Guide
Page 9 of 24
No
Yes
No
Yes
DRED energy restriction is active:
 Wait until DRED energy restriction condition ends.
If DRED function is not required:
 Air-to-air units: Inputs D1, D2, D3 should be open
circuit (Note: Inputs D1 and D2 may be used to
control Quiet and Dry modes.)
 Hydronic units: Input D3 should be open circuit.
 Chillers: Inputs D1, D2, D3 should be open circuit
Display shows a
flashing dot ●?
Display shows dr?
Display shows a
code listed in
chapters 11, 12
or 13?
The controller has detected a fault.
Refer to chapters 11, 12 and 13.
Yes
es
No
Contact Temperzone customer service.
Check wiring between UC8 and
the thermostat.
Continued from previous page.
Satellite dish shown
on t-stat display?
Yes
No
TZT-100 or SAT-3
wall thermostat?
No
Yes
Display shows
diFF-P?
Pressure differential is too high to allow the inverter
compressor to start:
Wait until the pressures have equalised.
Ensure valves are open.
Ensure the EEV operates correctly.
Yes
es
No
Correct
compressor
model selected?
Change the compressor model selection.
Yes
es
No

TemperZone UC8 Specifications

General

Brand	TemperZone
Model	UC8
Category	Controller
Language	English