TemperZone UC8 - Default Chapter; Table of Contents

Temperzone UC8 Troubleshooting Guide
Page 2 of 24
Contents
1. Cautions ........................................................................................................................................... 3
2. Recommended service tool set ........................................................................................................ 3
3. Recommended set of spare parts ..................................................................................................... 3
4. Items to check first........................................................................................................................... 3
5. Controller start-up procedure ........................................................................................................... 4
6. Viewing system information ........................................................................................................... 5
7. Controller test mode ........................................................................................................................ 6
8. Commissioning mode ...................................................................................................................... 7
9. Timer durations ................................................................................................................................ 7
10. Troubleshooting procedure .............................................................................................................. 8
11. Fault messages ............................................................................................................................... 10
12. Fault codes. .................................................................................................................................... 13
13. Inverter fault codes ........................................................................................................................ 16
14. Fault codes shown on a room thermostat ...................................................................................... 17
TZT-100 room thermostat fault codes ................................................................................. 17
SAT-3 room thermostat fault codes ..................................................................................... 17
SAT-3 internal fault codes ................................................................................................... 17
SAT-3 + Zone controller fault codes ................................................................................... 17
SAT-3 + UC8 fault codes ..................................................................................................... 18
15. Protection function details ............................................................................................................. 19
High pressure protection (HP).............................................................................................. 19
Low pressure protection (LP) ............................................................................................... 19
Indoor coil frost protection ................................................................................................... 19
High temperature protection................................................................................................. 19
High suction line / evaporating temperature protection ....................................................... 20
Low discharge side superheat protection ............................................................................. 20
High discharge side superheat protection............................................................................. 20
Freeze protection .................................................................................................................. 20
Reverse cycle valve fault protection .................................................................................... 21
Overload protection .............................................................................................................. 21
High compression ratio protection ....................................................................................... 21
Low compression ratio protection ........................................................................................ 22
16. Lock-out ......................................................................................................................................... 22
17. Unit log .......................................................................................................................................... 23