York rooftop and central air conditioner error codes

Looking for an explanation of the error codes for a York rooftop and central air conditioner? The tables below contain this information. In particular, they decipher each of the alarm codes, tell what system exactly is experiencing an issue, and sometimes gives an advice on troubleshooting the appliance. You will appreciate these tips no matter whether you decide to fix it on your own or call a service engineer.

York central air conditioner error codes

ERROR CodeERROR ContentsPROTECT. CodePROTECT. Contents
EFOther malfunctionPFOther Protection
EEWater level checking
malfunction
PEReserve
EDOutdoor protectionPD
ECClear malfunctionPC
EBInverter Module ProtectionPB
EACompressor Over-current
(4 times)
PA
E9Communication
malfunction between PCB
and Display board
P9
E8Fan motor checking out of
control
P8Compressor Over-current
E7EEPROM malfunctionP7Power Lack/Over Volt
Protection
E6Over-zero checking
malfunction
P6Discharge Low-pressure
Protection
E5T3 sensor malfunctionP5Discharge High-pressure
Protection
E4T2B sensor malfunctionP4Discharge Pipe Temp.
Protection
E3T2A sensor malfunctionP3Compressor Temp.
Protection
E2T1 sensor malfunctionP2Condenser High Temp.
Protection
E1Communication
malfunction
P1Anti-cooling or Defrost
Protection
E0Phase sequence or lack of
phase
P0Evaporator Temp.
Protection
03#CCM/PC(gateway) Communication Malfunction
02#CCM/Function Module Communication Malfunction
01#CCM/NIM Communication Malfunction
00#CCM/PCB Communication Malfunction
ERROR CodeERROR Contents
H3Outdoor adding malfunction valid for host unit)
H2Outdoor decreasing malfunction valid for host unit)
H1Net communication malfunction
EFOther malfunction
E4T4Temp. Sensor malfunction
E3T3Temp. Sensor malfunction
E2Sensor malfunction
E1 E0Communication malfunction Phase sequence or lack of phase
PFOther Protection
PEOil Balance
PDOil Return
PADefrost Protection
P8Compressor Current 3rd Protection
P7Compressor Current 2nd Protection
P5Condenser High Temp. Protection
P4Discharge Pipe Temp. Protection
P3Compressor Current 1st Protection
P2Discharge Low-pressure Protection
P1 P0Discharge High-pressure Protection Compressor High Temp. Protection

DisplayMalfunction or Protection
E1Phase sequence error
E2Communication malfunction between indoor/outdoor units
E3T3 temperature sensor malfunction
E4T4 temperature sensor malfunction
E5T5 temperature sensor malfunction
E6Water-level alarm malfunction
PHigh pressure protection
PLow pressure protection
PPompressor current protection
PCompressor discharge temperature protection
PCondenser high temperature protection

York rooftop air conditioner error codes

ECO2

YPAL 050
YPAL 051
YPAL 060
YPAL 061
035-21979-002
New Release
DESIGN LEVEL F
SIMPLICITY ELITE CONTROL

Alarm codeDescription
01Compressor system 1 (compressors 1a, 1b) locked out on high pressure control. The circuit opened three times within a 2-hour window.
02
03Compressor system 2 (compressors 2a, 2b) locked out on high pressure control. The circuit opened three times within a 2-hour window
04
05Compressor system 1 (compressors 1a, 1b) locked out on low pressure control. The circuit opened three times within a 1-hour window.
06
07Compressor system 2 (compressors 2a, 2b) locked out on low pressure control. The circuit opened three times within a 1-hour window.
08
09Compressor system 1a locked out on compressor motor protection module. The circuit opened three times within a 1-hour window.
10Compressor system 1b locked out on compressor motor protection module. The circuit opened three times within a 1-hour window.
11Compressor system 2a locked out on compressor motor protection module. The circuit opened three times within a 1-hour window.
12Compressor system 2b locked out on compressor motor protection module. The circuit opened three times within a 1-hour window.
13First stage heating is locked out on limit switch trips. the circuit opened three times within a 1-hour window.
14Second stage heating is locked out on limit switch trips. the circuit opened three times within a 1-hour window.
15Third stage heating is locked out on limit switch trips. the circuit opened three times within a 1-hour window.
16First stage of heating is locked out because the ignition control board failed to turn on the gas valve after 5 minutes of operation or the gas valve has voltage on it and the control is not calling for the stage of heating.
17Second stage of heating is locked out because the ignition control board failed to turn on the gas valve after 5 minutes of operation or the gas valve has voltage on it and the control is not calling for the stage of heating.
18Third stage of heating is locked out because the ignition control board failed to turn on the gas valve after 5 minutes of operation or the gas valve has voltage on it and the control is not calling for the stage of heating.
19Space temperature sensor has failed open or shorted. The display will indicate –40.0
20Supply air temperature sensor has failed open or shorted. The display will indicate –40.0.
21Return air temperature sensor has failed open or shorted. The display will indicate –40.0
22Outdoor air temperature sensor has failed open or shorted. The display will indicate –40.0.
23Dirty filter switch has closed indicating the filters need replaced. this has no effect on the operation of the unit.
24The supply fan binary output has been turned on for 90 seconds and the air proving switch circuit has not closed.
25The supply fan binary output has been turned off for 90 seconds and the air proving switch circuit has not opened.
26A microelectronics failure has occurred and the control is operating on defaults.
27A microelectronics failure has occurred and the control is down due to a fatal fault.
28This indicates the supply fan binary output is turned on and the supply fan overload circuit is open. This has to occur 3 times within a two hour window.
29This indicates the outdoor air humidity sensor is out of range. When this occurs, the unit controller switches the economizer type to dry bulb.
30This indicates the return air humidity sensor is out of range. When this occurs, the unit controller switches the economizer type to single enthalpy.
31This indicates the IAQ (CO2) sensor is out of range. The unit controller changes the ventilation mode to fixed minimum.
32This indicates the real time clock cannot be read as a result of a hardware failure.
33This indicates the space temperature offset is greater than 20 K ohms.
34This indicates the cv/vav input is out of range. The unit will lock out.
35This indicates the 24-volt supply circuit has dropped below the allowable level. the control will shut down until the voltage rises above 19.2 vac
36This indicates the unit cooling and heating operation is shut down because the unit is operating in a smoke purge mode.
37This indicates the duct static pressure has exceeded the programmed duct static shutdown setpoint.
38This indicates the supply air temperature has exceeded the programmed supply air temp alarm setpoint for cooling.
39This indicates the supply air temperature has exceeded the programmed supply air temp alarm setpoint for heating.
40This indicates an economizer minimum position alarm.
41This indicates the space temperature is above the space temp trending alarm temp and moving away from the space temperature setpoint.
42This indicates the duct static has not risen quickly enough in a vav unit when the supply fan is energized.
43This indicates the hydronic heat freeze stat has opened and the outdoor temperature is below 45.0° f