47
Table 2. Alert Codes and Troubleshooting
GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), PA=Pure Air S, ZA=Zone system and TS=Thermostat
Alert
Code
Inverter
Flash
Code
Priority
Condition
Actual Displayed
Alert Text
Under dealer
control center >
Notifications
Component or System Operational State and Troubleshooting Tip
How to clear alert code
71504
Information
Only-Dealer
OU: Suction
Temperature
Sensor:
incorrect
reading
•
Measured suction temperature (ST) is not within the expected range.
• No major impact to the system
•
Check and replace sensor if it is failed.
Automatically clears when the system
detects that the issue no longer exists.
71505
Information
Only-Dealer
OU: Liquid
Temperature
Sensor:
incorrect
reading
•
Measured liquid temperature (LT) is not within the expected range.
• No major impact to the system
•
Check and replace sensor if it is failed.
Automatically clears when the system
detects that the issue no longer exists.
71506
Information
Only-Dealer
OU: Suction
Pressure
Sensor:
Incorrect
Reading
•
Measured suction pressure (SP) is not within the expected range.
• No major impact to the system
•
Check and replace sensor if it is failed.
Automatically clears when the system
detects that the issue no longer exists.
71507
Information
Only-Dealer
OU: Liquid
Pressure
Sensor:
Incorrect
Reading
•
Measured liquid pressure (LP) is not within the expected range.
• No major impact to the system
•
Check and replace sensor if it is failed.
Automatically clears when the system
detects that the issue no longer exists.
71508
Information
Only-Dealer
OU: Outdoor
Temperature
Sensor:
Incorrect
Reading
•
If measured outdoor temperature (ODT) is not within the expected range.
• No major impact to the system
•
Check and replace sensor if it is failed.
Automatically clears when the system
detects that the issue no longer exists.
71509
Information
Only-Dealer
HP: Outdoor
Coil
Temperature
Sensor:
Incorrect
Reading
•
If measured outdoor coil temperature (ODTCoil T) is not within the expected range.
• No major impact to the system
•
Check and replace sensor if it is failed.
Automatically clears when the system
detects that the issue no longer exists.
71510
Service
Soon
OU: ID TXV
Failure
• Super Heat average is not in expected range. (Too high or too low superheat)
•
Replace Expansion Valve.
Automatically clears when the system
detects that the issue no longer exists.
71511
Service
Soon
IU: Duct or
Filter Blockage Clean ducts or replace filter.
Automatically clears when the system
detects that the issue no longer exists.
71512
Service
Urgent
OU: High-
Pressure
Switch Fault
• If switch tripped without meeting the liquid pressure condition.
• If Liquid pressure > 500 psig then replace high-pressure switch.
Automatically clears when the system
detects that the issue no longer exists.
71513
Service
Soon
OU: Low-
Pressure
Switch Fault
• If switch tripped without meeting the suction pressure condition.
• Replace low-pressure switch.
Automatically clears when the system
detects that the issue no longer exists.
71514
Service
Soon
OU: System
Low on
Refrigerant
Charge
•
If sub cooling average is not within expected range for given ODT and compressor Hz.
• Add refrigerant
Automatically clears when the system
detects that the issue no longer exists.
71515
Service
Urgent
HP: Reversing
Valve Stuck
• If liquid and suction pressure average ratio does not fall within the expected range.
• Service reversing valve message.
Automatically clears when the system
detects that the issue no longer exists.
