Yorkguard IV and V
Re: Lockout Codes / Fault Codes
The Yorkguard IV and V boards both have diagnostic functionality that will energize the X/L terminal to flash a light at the indoor thermostat if abnormal operating conditions occur.
The "lockout" can be Reset at the thermostat by: 1) cycling power to the air handler or 2) turning the thermostat system switch "Off" and then back to "On".
LOCKOUT CODES:
Flashes | Description |
Heartbeat | Normal operation (No Faults) |
2 | Hi pressure cut-out open |
3 | High compressor discharge temperature |
4 | Low compressor discharge temperature |
5 | Default defrost (liquid line temp too cold) |
6 | Discharge (or any) sensor open or shorted |
7 | Outdoor sensor open or shorted |
8 | Liquid line sensor open or shorted |
9 | Bonnet sensor shorted |
Fast Flash | Analyzer plugged-in |
WHAT TO LOOK FOR:
Flash | Cooling | Heating |
2 |
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3 |
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4 |
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5 |
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6 |
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7 |
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8 |
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9 |
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