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XP15 Comfort Alert Diagnostic Codes

Article ID: 600
Last updated: 13 Feb, 2019

Lennox Heat Pump: XP15

Re: Comfort Alert Diagnostic Codes

The XP15 Heat Pumps have a compressor protection module. It has its own diagnostic fault indication.

Emerson Comfort Alert Module
LED Description
Green Line voltage power present
Red Y is present, but the module is in fault
Yel 1 Extremely long compressor run cycle
Yel 2 Pressure switch trip (either High or Low)
Yel 3 Compressor short-cycling
Yel 4 Compressor locked rotor
Yel 5 Line voltage not present
Yel 6 Open "Start" windings
Yel 7 Open "Run" windings
Yel 8 Stuck contactor
Yel 9 Low voltage < 17VAC
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Article ID: 600
Last updated: 13 Feb, 2019
Revision: 5
Access: Public
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