Lennox MWCB Series Service Manual

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5.4. Reversing Valve Check
a. Power on the system and use a digital tester to measure the voltage when the system is operating in cooling mode and
the reading should be 0VAC. When the system is operating in heating mode, the value should be 230VAC. If the voltage
value is not in the specied ranges, the PCB will be the issue and will need to be replace.
Turn off the system power use a digital tester to measure the resistance. The resistance value should be 1.8~2.5 Ω.

Lennox MWCB Series Specifications

General

Brand	Lennox
Model	MWCB Series
Category	Air Conditioner
Language	English