Lennox MPB012S4S Service Manual

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Table 15. Model / Compressor Cross-Reference
ODU Model # Compressor Model # Blue - Red Blue - Black Red - Blue
MLA018S4S-1P
MLA024S4S-1P
ATF235D22UMT 0.75Ω
MLA018S4M-1P ATF235D22UMT 0.75Ω
MLA030S4M-1P ATF310D43UMT 0.65Ω
MLA036S4M-1P ATQ360D1UMU 0.37Ω
29.2. IPM Check
Measuretheresistancevalueofeachwindingbyusingthetester.
Turnoffthepower,letthelargecapacityelectrolyticcapacitorsdischargecompletely,anddismounttheIPM.Useadigital
testertomeasuretheresistancebetweenPandUVWN;UVWandN.
Table 16. Normal Resistance Values
Digital Tester Normal Resistance Value Digital Tester Normal Resistance Value
(+)Red (-)Black
∞
(SeveralMΩ)
(+)Red (-)Black
∞
(SeveralMΩ)
P
N U
N
U V
V W
W (+)Red
Figure 75. Testing

Lennox MPB012S4S Specifications

General

Brand	Lennox
Model	MPB012S4S
Category	Air Conditioner
Language	English