PG3 - Status/Diagnostic Codes

York Package Unit: PG3

Re: Status Codes / Diagnostic Codes

These York package units have a control board inside the unit control compartment that will flash a diagnostic code that shows the operating status of the unit.

Status/Diagnostic Codes
Status LED	A2L LED	Condition	Solution
Slow Green	Off	Normal Operation - no calls from thermostat
Rapid Green	Off	Indicates the single-stage DSI control board is in factory test mode
Slow Amber	Off	Normal Operation - with a call for HEATING
Rapid Amber	Off	Low flame signal	Flame signal below 1.5 microamps Check flame sensor Check gas pressure
4 Amber	Off	No Call for G	Check low voltage wiring
1 Red	Off	Flame sensed with gas valve off	Stuck gas valve Shorted flame sensor Faulty control
2 Red	Off	Pressure switch stuck closed	Bad pressure switch Inducer fan relay stuck on
3 Red	Off	Pressure switch stuck open	Bad pressure switch Bad inducer fan Bad inducer fan relay Blocked or restricted vent Condensate drainage issue
4 Red	Off	Limit switch open / open fuse	Bad limit Low airflow Over-Fired
5 Red	Off	Limit circuit open more than 15min / Tripped rollout	Bad switch Cracked heat exchanger Bad inducer motor Over-Fired
6 Red	Off	4 open pressure switch faults in one heating cycle	Bad pressure switch Bad inducer fan Bad inducer fan relay Blocked or restricted vent Condensate drainage issue
7 Red	Off	3 failed ignition attempts	Bad igniter Dirty flame sensor No gas flow
8 Red	Off	Flame was established but later lost - 5 times in one heating cycle	Dirty flame sensor Combustion air problem
9 Red	Off	Grounding or line polarity fault	Look for loose or missing Ground wire Try reversing transformer power
10 Red	Off	Gas valve circuit shorted	Check gas valve wiring
11 Red	Off	Limit circuit open between 5-15min	Bad limit Blower failure
4 & 5 Ton Models with A2L Sensor
Rapid Red	On	Indicates an A2L refrigerant leakage or potentially gas leakage	Owner to notify service personnel as soon as possible. Maintain power to the unit and try to keep the house ventilated by opening windows if possible. Service personnel to locate refrigerant leak point(s) and repair. Adjust unit charge and get unit back to proper functions. Note: There is potential for the A2L sensor to detect gas or propane leakage. If the service person can not find refrigerant leakage, check on gas pipe leaks and other gas heat components for leakage. Change to new parts after you confirm gas heat component leak(s).
1 Red	On	Occurs only on power up. Indicates the A2L sensor is not connected to the A2L terminal of the single-stage DSI control board	Ensure the correct A2L sensor is properly plugged in the A2L terminal of the single-stage DSI control board. Ensure the A2L sensor cable is not damaged.
2 Red	On	ndicates the A2L sensor is not connected to the A2L terminal of the single-stage DSI control board	Ensure the correct A2L sensor is properly plugged in the A2L terminal of the single-stage DSI control board. Ensure the A2L sensor cable is not damaged.
3 Red	On	Indicates the A2L sensor may have failed or broken	Replace to a new part, and ensure it is the correct A2L sensor.

Fault Code Retrieval: With no thermostat call push and release the LAST ERROR button. The LED will flash up to 5 stored fault codes, beginning with the most recent. If there are no codes in memory, the LED will flash two green flashes.

Clear the Fault Codes: Push and hold the LAST ERROR button for at least five seconds. The LED will flash three green flashes when the memory has been cleared.