York rooftop and central air conditioner error codes

Central air conditioner

Indoor unit

Malfunction and Protection Code Table

ERROR CodeERROR Contents PROTECT. Code PROTECT. Contents
EF Other malfunction PF Other Protection
EE Water level checking
malfunction
PEReserve
EDOutdoor protection PDReserve
EC Clear malfunction PC Reserve
EB Inverter Module ProtectionPBReserve
EA Compressor Over-current
(4 times)
PAReserve
E9Communication
malfunction between PCB
and Display board
P9Reserve
E8Fan motor checking out of
control
P8Compressor Over-current
E7 EEPROM malfunction P7 Power Lack/Over Volt
Protection
E6 Over-zero checking
malfunction
P6 Discharge Low-pressure
Protection
E5T3 sensor malfunction P5Discharge High-pressure
Protection
E4T2B sensor malfunction P4Discharge Pipe Temp.
Protection
E3 T2A sensor malfunction P3Compressor Temp.
Protection
E2 T1 sensor malfunction P2 Condenser High Temp.
Protection
E1Communication
malfunction
P1 Anti-cooling or Defrost
Protection
E0 Phase 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

Outdoor unit

York air conditioner error codes

Malfunction and Protection Code Table


ERROR CodeERROR Contents
H3 Outdoor adding
malfunction (valid for
host unit)
H2 Outdoor decreasing
malfunction (valid for
host unit)
H1 Net communication
malfunction
EFOther malfunction
E4T4 Temp. Sensor malfunction
E3T3 Temp. Sensor malfunction
E2Sensor malfunction
E1 E0Communication
malfunction Phase
sequence or lack of phase
PFOther Protection
PEOil Balance
PD Oil Return
PADefrost Protection
P8 Compressor Current
3rd Protection
P7Compressor Current
2nd Protection
P5 Condenser High Temp.
Protection
P4Discharge Pipe Temp.
Protection
P3 Compressor Current 1st
Protection
P2 Discharge Low-
pressure Protection
P1 P0 Discharge High-
pressure Protection
Compressor High
Temp. Protection

Control system

Malfunction Code of Outdoor unit


Display Malfunction or Protection
E1 Phase sequence error
E2 Communication malfunction between indoor/outdoor units
E3 T3 temperature sensor malfunction
E4 T4 temperature sensor malfunction
E5T5 temperature sensor malfunction
E6Water-level alarm malfunction
P High pressure protection
P Low pressure protection
P Pompressor current protection
P Compressor discharge temperature protection
P Condenser 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.
02COMPRESSOR SYSTEM 1 (COMPRESSORS 1A, 1B) LOCKED OUT ON HIGH PRESSURE CONTROL. THE CIRCUIT
OPENED THREE TIMES WITHIN A 2-HOUR WINDOW.
03COMPRESSOR SYSTEM 2 (COMPRESSORS 2A, 2B) LOCKED OUT ON HIGH PRESSURE CONTROL. THE CIRCUIT
OPENED THREE TIMES WITHIN A 2-HOUR WINDOW
04COMPRESSOR SYSTEM 2 (COMPRESSORS 2A, 2B) LOCKED OUT ON HIGH PRESSURE CONTROL. THE CIRCUIT
OPENED THREE TIMES WITHIN A 2-HOUR WINDOW.
05COMPRESSOR SYSTEM 1 (COMPRESSORS 1A, 1B) LOCKED OUT ON LOW PRESSURE CONTROL. THE CIRCUIT
OPENED THREE TIMES WITHIN A 1-HOUR WINDOW.
06COMPRESSOR SYSTEM 1 (COMPRESSORS 1A, 1B) LOCKED OUT ON LOW PRESSURE CONTROL. THE CIRCUIT
OPENED THREE TIMES WITHIN A 1-HOUR WINDOW.
07COMPRESSOR SYSTEM 2 (COMPRESSORS 2A, 2B) LOCKED OUT ON LOW PRESSURE CONTROL. THE CIRCUIT
OPENED THREE TIMES WITHIN A 1-HOUR WINDOW.
08COMPRESSOR SYSTEM 2 (COMPRESSORS 2A, 2B) LOCKED OUT ON LOW PRESSURE CONTROL. THE CIRCUIT
OPENED THREE TIMES WITHIN A 1-HOUR WINDOW.
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