PA error code (Multi-Zone Quantum Ultra Series)Updated 2 hours ago

Introduction

The “PA” error code is for multi-zone Quantum Ultra systems and indicates the units are experiencing a mode conflict. Mode conflicts occur when one unit requests heat while another requests cool.

Troubleshooting

Solution: Resolve this error by setting all the indoor units to the same mode. 

Causes: 

1. If the first-activated indoor unit (with the highest priority) operates in Cooling/Dehumidification mode, the other indoor units can only operate in Cooling/Dehumidification mode and Air Supply mode. Otherwise, an indoor unit attempting to operate in a different mode will report a mode conflict fault and will not be allowed to start up. This will not affect the indoor units already running. 

2. If the first-activated indoor unit (with the highest priority) operates in Heating mode, other indoor units can only operate in Heating mode. Otherwise, an indoor unit attempting to operate in a different mode will report a mode conflict fault and will not be allowed to start up. This will not affect the indoor units already running. 

Note: Avoid running the units on Auto mode, as it could cause this error.