TemperZone UC8 Troubleshooting Guide

Temperzone UC8 Troubleshooting Guide
Page 13 of 24
12. Fault codes.
Display
Fault
Possible causes
Possible remedy
F10
Outdoor fan
Incorrect DIP switch settings.
Change DIP switch settings.
Loose wiring between UC8 board and
outdoor fan speed controller board.
Repair wiring.
No power to outdoor fan speed
controller.
Ensure power is present.
Faulty outdoor fan speed controller
board.
Replace outdoor fan speed
controller.
F11
Indoor fan
Incorrect DIP switch settings.
Change DIP switch settings.
Loose wiring between UC8 board and
indoor fan speed controller board.
Repair wiring.
No power to indoor fan speed
controller.
Ensure power is present.
Faulty indoor fan speed controller
board.
Replace indoor fan speed
controller.
F12
No low pressure
transducer.
Cable has disconnected.
Reconnect cable.
Incorrect DIP switch settings.
Change DIP switch settings.
Faulty transducer.
Replace transducer.
F13
No high pressure
transducer.
Cable has disconnected.
Reconnect cable.
Incorrect DIP switch settings.
Change DIP switch settings.
Faulty transducer.
Replace transducer.
F14
Suction line
temperature
sensor
Loose connection.
Repair connections.
Faulty temperature sensor.
Replace sensor.
F15
Discharge line
temperature
sensor
Loose connection.
Repair connections.
Faulty temperature sensor.
Replace sensor.
F16
De-Ice temperature
sensor
Loose connection.
Repair connections.
Faulty temperature sensor.
Replace sensor.
F17
Outdoor coil
temperature
sensor
Loose connection.
Repair connections.
Faulty temperature sensor.
Replace sensor.
F18
Indoor coil
temperature
sensor
Loose connection.
Repair connections.
Faulty temperature sensor.
Replace sensor.
F19
Outdoor ambient
temperature
sensor
Loose connection.
Repair connections.
Faulty temperature sensor.
Replace sensor.
F20
Superheat
unknown
Check: low pressure transducer, suction line temperature sensor, high
pressure transducer, discharge line temperature sensor, outdoor coil
temperature sensor, indoor coil temperature sensor, DIP switch settings.
F21
Thermostat serial
comms lost
Loose wiring.
Repair connections.
Electrical interference.
Use twisted pair screened cable.
Signals A and B must form a pair.
Connect screen to 0V at the UC8.
Re-route cable away from other
cables.

TemperZone UC8 Specifications

General

Brand	TemperZone
Model	UC8
Category	Controller
Language	English