York E0
Indicates reverse phase sequence or missing phase in power supply.
York E1
Indicates room temperature sensor failure or out-of-range reading.
York E3
Indoor unit T2A coil/pipe temperature sensor hardware fault.
York E4
Indoor unit EEPROM configuration memory failure or checksum error.
York E5
Indicates T3 coil temperature sensor hardware malfunction.
York EC
Indicates system diagnostic clear command or malfunction reset.
York EE
Indicates water level switch or condensate drain fault.
York E8
Indicates indoor fan motor speed feedback loss or control error.
York E9
Loss of communication between main control PCB and display board.
York F0
System overload protection trip.
York F1
Outdoor unit IPM power module thermal or current protection trip.
York F2
Outdoor compressor direct operating current exceeding rated limit.
York F3
Loss of communication between IPM drive module and outdoor PCB.
York F4
Compressor discharge line high-temperature protection trip.
York F5
Outdoor DC fan motor speed feedback or drive control fault.
York F6
Outdoor ambient air temperature sensor hardware fault.
York F7
Outdoor suction line temperature sensor hardware fault.
York F8
Outdoor DC fan motor electrical or mechanical failure.
York F9
Indoor front auto-lifting motorized panel position fault.
York P0
Indoor evaporator coil freeze-up or low temperature protection trip.
York P1
Indoor unit anti-cold blow or defrost protection active.
York P2
Outdoor condenser coil high temperature protection trip.
York P3
Compressor shell or internal motor temperature protection trip.
York P4
Compressor discharge line temperature protection threshold reached.
York P5
High refrigerant discharge pressure safety cut-out trip.
York P6
Low refrigerant suction/discharge pressure safety cut-out trip.
York P7
Incoming power supply loss of phase or over-voltage protection.
York H3
Host outdoor unit detecting unconfigured outdoor module on network.
York H2
Host outdoor unit detecting missing outdoor module on system bus.
York H1
System control network communication bus malfunction.
York EF
Unspecified miscellaneous system malfunction.
York T4
Temperature sensor circuit hardware malfunction.
York T3
T3 temperature sensor circuit hardware malfunction.
York E2
T1 indoor room temperature sensor hardware malfunction.
York PF
Unspecified system protection shutdown trip.
York PE
Reserved manufacturer diagnostic code.
York PD
Reserved manufacturer diagnostic code.
York PA
Reserved manufacturer diagnostic code.
York P8
Compressor motor electrical overcurrent protection trip.
York E6
Outdoor inverter drive board zero-crossing detection circuit fault.
York ED
Unmapped general outdoor unit safety protection trip.
York PC
Reserved code position in current manufacturer literature.
York EB
Compressor inverter module safety protection trip.
York PB
Reserved manufacturer diagnostic code.
York EA
Repeated compressor overcurrent lockout after 4 consecutive trips.
York P9
Reserved manufacturer diagnostic code.
York E7
Loss of communication between indoor unit and outdoor unit.
York 03#
Communication failure between CCM controller and PC gateway.
York 02#
Communication failure between CCM controller and function module.
York 01#
Communication loss between CCM controller and NIM interface module.
York 00#
Communication failure between CCM controller and main PCB.
York E14
Indoor blower fan motor failure or speed control fault.
York F12
Outdoor unit EEPROM memory corruption or checksum failure.
York F22
Outdoor unit incoming AC line supply overcurrent trip.
York F19
Outdoor unit incoming AC supply voltage out-of-range trip.
York F21
Outdoor defrost temperature sensor hardware fault.
York F25
Outdoor discharge line temperature sensor hardware fault.
York F11
Outdoor compressor speed or operational parameter deviation fault.
York F28
Station loop detection error on communication network.
York F23
Compressor single-phase electrical overcurrent protection trip.
