YH2E/YH2F Diagnostic & Fault Codes

York Heat Pump: YH2E / YH2F

Re: Lockout Codes / Fault Codes

The control shall provide fault codes using the Status LED. The table below describes the LED displays during fault codes.

Unless otherwise specified, the control shall provide flashes that are a 1/3 second on and 1/3 second off for fault codes.
The control shall only display a single fault code on the LED. The control shall display the fault code on the LED repeatedly with a 2 second off period between repetitions of the fault code.
If multiple fault codes are present at the same time, the LED shall display only the most recent fault.

The "lockout" can be Reset by: 1) cycling power to 24V power to the defrost board or 2) turning the thermostat system switch "Off" and then back to "On".

LOCKOUT CODES:

Flashes	Description
2	Hi pressure fault (not in lockout yet)
3	Hi pressure lockout (last mode was compressor)
4	Hi pressure lockout (last mode defrost)
5	Low pressure lockout (last mode compressor)
6	Low voltage (< 19.2 volts)
7	Low voltage (< 16 volts)
8	Coil sensor failure (open or shorted)
9	Ambient sensor failure (open or shorted)
10	Control failure
11	"W" and "O" signal received together
12	"Y2" signal present without "Y1"