Service and Parts Manual (2018, 2019, 2020, 2021, 2022)

2 PB
Table of Contents
INTRODUCTION 4
Important Safety Information 4
Personal Injury Or Death Hazards 5
Operation of Equipment in During Construction 7
Typical Unit Components and Dimensions 7
Model Number Reference Guide 8
Serial Number Reference Guide 9
Product Features 10
SPECIFICATIONS 12
General Specications 9-12k Heat Pump Models 12
Electrical Data 14
OPERATION 17
Function and Control 17
Buttons and Display 17
Temperature Denition 17
System Basic Function 17
1) Cooling Mode 17
2) Heating Mode 17
3) Room Freeze Protection (AUTO HEATING) 18
4) Temperature Sensor Open Circuit or Short Circuit Protection 18
5) Power cut protection 18
6) Compressor and DC-inverter features 18
7) Smart fresh air system 19
Advanced Functions 21
Advanced Settings 21
Memory Function 22
FD Control (front-desk control) & 24V REMOTE THERMOSTAT 22
Protection Functions 23
System Conguration Fresh Air Vent Control 25
Digital Control User Input Conguration 28
Settings- Detailed Congurations 29
Refrigeration Sequence Of Operation 30
Refrigerant System Diagram 31
Routine Maintenance 32
INSTALLATION 33
PTAC Installation Recommendations 33
Wall Sleeve Installation Instructions (PDXWS) 34
Alternate Wall Installations 35
PXDR10 Drain Kit Installation 38
External Drain 39
PXGA Standard Grille 40
Chassis Install 42
Remote Control Thermostat Installation 43
Front Desk Control Terminal 44
Final Inspection & Start-up Checklist 45
UNIT DISASSEMBLY AND COMPONENT REPLACEMENT 46
Remove Chassis 46
Remove User Interface 47
Open Electrical Control Box 48
Remove Main PCB (logic) Board 48
Remove Power Cord 49
Remove Power PCB 50
Remove IPM PCB (Inverter Board) 52
Remove Blower Wheel (Inside Fan) 53
Remove Blower Wheel Motor (Inside Fan) 56
Remove Heating Element 58
Remove Freshaire Components 59
Remove Outdoor Fan 61
TABLE OF CONTENTS