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
86 PB
TROUBLESHOOTING
Basic Troubleshooting
Malfunction Possible Reasons Solution
Not cooling/heating adequately
Something is blocking the indoor/out-
door air outlet.
Make sure that there are no obstacles
at the indoor/outdoor air outlet.
Make sure that the grill is suitable for
the unit, inappropriate grill will cause
the compressor to fault; make sure that
the grill has more than 70% .
Set unsuitable temperature.
Set higher/lower temperature by the
control board. NOTE: temperature set-
ting restriction will restrict the setting
temperature. See the ADVANCED SET-
TINGS section.
Indoor air lter is dirty.
Should clean the lter at least every
month.
Room is hot/cold.
Let unit run a little longer that room
temperature will be lower/higher.
Heat leakage between indoor and
outdoor.
Block the leakage place.
Indoor coil not cold/heat. Charge the refrigerant.
Unit has noise
"Some moving parts of the unit are
loose causing bad vibration.
Something in the air way."
Make sure that all moving parts are
assembled well, and nothing is in the
air way.
Bad smell when heating The dust on the E-heater is heating.
The bad smell will disappear a little
later.
Outlet temperature is not always cool-
ing/heating
Outlet temperature is not high enough
when heating by heat pump.
When outdoor ambient temp is low,
the heat pump will not be able to offer
enough heat. Soon after that, the E-
heater will come on to heat.
Fan stops when cooling/heating.
It is normal when the CONSTANT FAN
is OFF. You can enable the CONSTANT
FAN.
Water dripping outdoors. Drain pipe kit not installed. Install the drain pipe kit.
Water dripping indoors. Wall sleeve is not installed correctly.
Install the wall sleeve according to the
installation manual.
Indoor coil freeze
Outdoor temperature is too low in cool-
ing mode.
When outdoor temperature is drop to
55°F (12.8°) or below, it will cause that
indoor coil to freeze. Open the fresh air
door, and running at fan mode.
Filter is dirty.
Clean the lter to recover the normal
air ow
Figure 711