CONTENTS
INTRODUCTION ................................................................................................................. 3
SAFETY WARNING............................................................................................................. 3
POWER SUPPLY ................................................................................................................ 3
ENVIRONMENTAL .............................................................................................................. 3
SPECIFICATIONS ............................................................................................................... 6
CONTROLLER .................................................................................................................. 11
Sensors ...................................................................................................................... 11
Reset Button ............................................................................................................... 12
OPERATION ...................................................................................................................... 13
LED STATUS CODES ....................................................................................................... 18
OPERATIONAL SEQUENCES .......................................................................................... 20
Faults .......................................................................................................................... 21
Heat Pump Mode ........................................................................................................ 22
Element Mode - Ambient ........................................................................................... 23
Element Mode - Fault ................................................................................................. 24
WIRING DIAGRAM ............................................................................................................ 26
COMMON COMPLAINTS .................................................................................................. 27
FAULT FINDING ................................................................................................................ 31
Sensors ...................................................................................................................... 48
Refrigerant Charge ..................................................................................................... 54
Storage Tank .............................................................................................................. 56
Heat Pump Module ..................................................................................................... 62
Refrigeration System .................................................................................................. 66
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
Service. All printed copies are deemed uncontrolled.
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