Service and Parts Manual (2018, 2019, 2020, 2021, 2022)
Table Of Contents
- INTRODUCTION
- Important Safety Information
- Personal Injury Or Death Hazards
- Operation of Equipment in During Construction
- Typical Unit Components and Dimensions
- Model Number Reference Guide
- Serial Number Reference Guide
- Product Features
- General Specifications 9-12k Heat Pump Models
- Electrical Data
- Function and Control
- Buttons and Display
- Temperature Definition
- System Basic Function
- 1) Cooling Mode
- 2) Heating Mode
- 3) Room Freeze Protection (AUTO HEATING)
- 4) Temperature Sensor Open Circuit or Short Circuit Protection
- 5) Power cut protection
- 6) Compressor and DC-inverter features
- 7) Smart fresh air system
- Advanced Functions
- Advanced Settings
- Memory Function
- FD Control (front-desk control) & 24V REMOTE THERMOSTAT
- Protection Functions
- System Configuration Fresh Air Vent Control
- Digital Control User Input Configuration
- Settings- Detailed Configurations
- Refrigeration Sequence Of Operation
- Refrigerant System Diagram
- PTAC Installation Recommendations
- Wall Sleeve Installation Instructions (PDXWS)
- Alternate Wall Installations
- PXDR10 Drain Kit Installation
- External Drain
- PXGA Standard Grille
- Chassis Install
- Remote Control Thermostat Installation
- Front Desk Control Terminal
- Final Inspection & Start-up Checklist
- Remove Chassis
- Remove User Interface
- Open Electrical Control Box
- Remove Main PCB (logic) Board
- Remove Power Cord
- Remove Power PCB
- Remove IPM PCB (Inverter Board)
- Remove Blower Wheel (Inside Fan)
- Remove Blower Wheel Motor (Inside Fan)
- Remove Heating Element
- Remove Freshaire Components
- Remove Outdoor Fan
- Remove Reversing valve Solenoid
- Refrigerant Charging
- Undercharged Refrigerant Systems
- Overcharged Refrigerant Systems
- Restricted Refrigerant System
- Sealed System Method of Charging/ Repairs
- Hermetic Components Check
- Reversing Valve Description And Operation
- Testing The Reversing Valve Solenoid Coil
- Checking The Reversing Valve
- Touch Test Chart : To Service Reversing Valves
- Compressor Checks
- Compressor Replacement
- Compressor Replacement -Special Procedure in Case of Compressor Burnout
- Check Indoor Fan Motor
- Check Outdoor Fan Motor
- Check Fan Motor Capacitors
- Main PCB (logic) Board Connector Identification
- Power PCB (Power Board) Connector Identification
- Basic Troubleshooting
- Error code and solutions
- Unit Does Not Operate
- Check Electric Heater Control
- Check Thermistors
- Check Thermistors -Resistance Table of Thermistors (5K)
- Check Thermistors -Resistance Table of Thermistors (50K)(Compressor Discharge Sensor)
- PARTS CATALOG
26 PB
22
8
Digital Control User Input Configuration
The adjustable control dip switches are located at the front portion of the digital Smart Center. The inputs are only visible and accessible with the front cover
removed from the PTAC.
Dip Switch Setting
Switch 1-Reserved.
Switch 2-Heat pump enable/disable.
Moving Dip Switch #2 to “OFF” can be set as Emergency Heat
Override. In the unlikely event of a compressor failure, a heat pump unit
may be switched to operate in only the electric heat mode until repairs
can be made.
Switch 3-Electric strip enable/disable.
Switch 4-Reserved.
Switch 5-Room Freeze Protection
Units are shipped from the factory
Figure 28
Dip Switches
DIP SWITCH
1234567
ON
OFF
Reserved
Reserved
Electric memory enable/disable
Room freeze protection
Reserved
Electric strip enable/disable
Heat pump enable/disable
Reserved
LOCATION OF
DIP SWITCHES
ON UNIT
FRP028
Switch Description Function Factory setting Option
#1 Reserved / OFF /
#2 Heat pump ON-enable heat pump;
OFF-disable heat pump, run electric heat
only.
HP models-ON
Electric heat only-OFF
OFF-Overrides compressor
operation(HP models only)
#3 Electric strip ON-enable electric heat;
OFF-disable electric heat.
ON
Factory set. Do not change.
#4 Reserved / OFF /
#5 Room
Freeze
Protection
ON-Allows the unit to ensure the indoor room
temperature does not fall below 50℉even
when turned off;
OFF-disable freeze protection.
ON OFF
#6 Electric memory
enable/disable
ON-enable;
OFF-disable.
ON OFF
#7 Reserved / OFF /
#8 Reserved / OFF /
With the room freeze protection enable.Room Freeze Protection can be
switched off at the owner’s preference by moving Dip Switch 5 to
“OFF”.This feature will monitor the indoor room conditions and in the event
that the room falls below 50°F, the unit will automatically run “heating”.
This occurs regardless of mode.
Switch 6-Electric memory enable/disable
The factory setting is enabled. The smart center will remember user’s
setting. After power cut recovery, the unit will operate the same status as
before power cut. Moving Dip Switch 6 to “OFF”will disable this feature,
smart center will no more remember settings.
Switch 7,Switch 8-Reserved.
OPERATION
System Conguration Fresh Air Vent Control