38MBRC: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
16
DIAGNOSIS AND SOLUTION
Outdoor Unit Error Display
Table 8 — Diagnostic Guide for Outdoor Units
DISPLAY LED STATUS PAGE
EL01 Communication malfunction between the indoor and outdoor units Page 18
EC07 Outdoor DC fan motor malfunction/fan speed out of control Page 21
EC50 Outdoor temperature sensor error --
EC51 Outdoor EEPROM error --
EC52 Condenser coil temperature sensor (T3) malfunction Page 23
EC53 Outdoor ambient temperature sensor (T4) malfunction Page 23
EC54 Compressor discharge temperature sensor TP is on open circuit or has short circuited Page 23
EC55 Outdoor IPM module temperature sensor malfunction --
EC71 Over current failure of the outdoor DC fan motor Page 21
EC72 Lack phase failure of the outdoor DC fan motor Page 23
PC00 Inverter module (IPM) protection Page 25
PC02 Top temperature protection of compressor Page 26
PC06 Discharge temperature protection of compressor Page 27
PC08 Outdoor overcurrent protection Page 28
PC0A High temperature protection of condenser Page 29
PC0F PFC module protection Page 30
PC0L Low temperature protection of the outdoor unit Page 35
PC10 Outdoor unit low AC voltage protection Page 31
PC11 Outdoor unit main control board DC bus high voltage protection Page 31
PC12 Outdoor unit main control board DC bus high voltage protection /341 MCE error Page 31
PC30 System high pressure protection Page 32
PC31 System low pressure protection --
PC40 Communication error between the outdoor main chip and compressor driven chip Page 33
PC42 Compressor start failure of the outdoor unit --
PC43 Outdoor compressor lack phase protection Page 34
PC44 Outdoor unit zero speed protection Page 28
PC45 Outdoor unit IR chip drive failure Page 35
PC46 Compressor speed has been out of control Page 28
PC49 Compressor overcurrent failure Page 28
PH90 High temperature protection of the evaporator --
PH91 Low temperature protection of the evaporator --
LC06 High temperature protection of the inverter module (IPM) Page 26
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