TemperZone UC8 Troubleshooting Guide

Temperzone UC8 Troubleshooting Guide
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1. Cautions
 Turn off mains power before opening the electrical panel of a unit.
 When disconnecting and connecting connectors hold them by the housing. Do not pull on the
wires.
 Use as little force as possible when replacing electronic circuit boards.
 Never pull on individual electronic components.
2. Recommended service tool set
 Set of screwdrivers of various sizes: blades, pozi-drive and Phillips
 Socket set (6mm to 19mm metric)
 Allan keys (5mm to 10mm metric)
 Small and medium size crescent
 Long nose pliers
 Multi-meter and probe leads of good quality
 Bottle with R410a refrigerant
 Refrigerant scales
 Mobile telephone / Smart-phone
Additional potentially useful items:
 Amp-meter clamp
 Temperature probe
 Length of appliance wire, mains voltage rated
 Wire cutting and stripping tool
 Roll of electrical insulation tape
 Quick-connect (spade) terminals (6.3mm, 0.25”) (plastic or rubber insulating boots are useful too)
 Quick-connect (spade) crimp tool
 Pressure gauges for R410a refrigerant
 Torch or other battery powered lamp (e.g. headlamp)
 Temperzone wireless service tool (WSU) and a smart phone
 Laptop computer with USB to RS485 converter (Hyperterm or TeraTerm program installed)
3. Recommended set of spare parts
 Known good UC8 controller circuit board, programmed with software version 2.1.9 or later
 Set of Temperzone standard temperature sensors (yellow, blue, red and white leads)
 34.5 bar and 45 bar pressure transducers
 Temperzone pressure transducer leads
4. Items to check first
 What exactly is the complaint? Does the unit run at all?
 Under which conditions does the problem occur?
 Check mains power is properly connected and is the mains voltage correct.
 Check control wires between indoor and outdoor units and to the thermostat or other controller.
 Check all unit internal wiring is securely fastened and connected.
 Check that DIP switch settings agree with information given in the unit documentation.
 Take careful note of any information shown on the controller board display.

TemperZone UC8 Specifications

General

Brand	TemperZone
Model	UC8
Category	Controller
Language	English