Model reference

Midea MP12HMB63

Air Conditioner

1 document11 error codes

Available documentation

Service Manual

Service Manual Ptac Series 7,000-15,000 Btu/h36 pg
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AS on my Midea MP12HMB63

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Open or short circuit of ambient

From Service Manual 672812, p.24:

1.Access service mode to confirm the active fault code and read stored error history.

2.Disconnect the sensor and measure resistance. Expected: 10 kΩ to 12 kΩ at 77°F (25°C).

3.Check the sensor harness for opens. A reading outside 5 kΩ to 50 kΩ indicates a failed sensor.

Part WP8577274

Temperature thermistor

Error codes (11)

CodeMeaning

ASOpen or short circuit of ambient temperature sensor (T1).CSOpen or short circuit of condenser temperature sensor (T3).E4Communication malfunction between main control board and display board (no…ESOpen or short circuit of evaporator temperature sensor (T2).FCFront desk control mode HIRoom temperature is higher than 99°F (above display range).HSOpen or short circuit of exhaust temperature sensor (T5 or T6).LCControl panel pads are not available; unit can only be set by wired controller LEDrive-by-wire (wired controller) control failure LORoom temperature is lower than 32°F (below display range).OSOpen or short circuit of outside temperature sensor (T4).

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