Ts12-S - Lennox MCB Series Service Manual

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4.13. TS12-S

Description: Inverter compressor drive error. An abnormal inverter compressor drive is detected by a special detection

circuit that includes communication signal detection, voltage detection and compressor rotation speed signal detection.

Possible Affected Components: Connection wires, IPM module board, outdoor fan assembly, compressor or outdoor

PCB.

Troubleshooting and Repair:

NOTE:

On various models the outdoor PCB can not be removed separately. In this situation the entire outdoor electric

control box should be replaced

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