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Mitsubishi Electric Mr Slim Split Systems Fault Basic
- Control Fault Codes
ER Wiring between indoor and outdoor units crossed over
No off indoor units exceeded
Eb Wiring between indoor and outdoor units crossed over
EC Start up timer
E6 Indoor/Outdoor transmission error (signal receiving indoor)
E7 Indoor/Outdoor transmission error (transmitting error)
E8 Indoor/Outdoor transmission error (signal receiving outdoor)
E9 Indoor/Outdoor transmission error (transmitting outdoor)
E0 Remote controller transmission error (signal receiving RC)
E3 Remote controller transmission error (transmitting RC)
E4 Remote controller transmission error (signal receiving indoor)
E5 Remote controller transmission error (signal receiving RC indoor)
EF M-net Transmission error (indoor outdoor)
Ed Serial transmission error outdoor
P1 Abnormality of room temp sensor indoor
P2 Abnormality of pipe temperature thermistor indoor
P4 Abnormality of drain sensor Indoor
P5 Manlfunction of drain up machine indoor
P6 Freezing/overheating protection defect indoor
P8 Abnormality of pipe temperature Indoor
P9 Abnormality of temperature thermistor/cond/evap Indoor
F1 Reverse phase detected
F2 L3 Open phase detected
F3 63L connector open
F4 49C connector open
F9 Connector 2 or more open
FA L2 phase open or 51CM connector open
F7 Reverse phase detector circuit (printed board fault)
F8 Input Circuit Fault
U2 Abnormal high discharge temperature
U2 Inner thermostat
U1 Abnormal high pressure 63H worked/direct open circuit
UE High Pressure (valve closed)
UL low pressure sensor
UD overheat protection
U6 Compressor over current overload cut out
UA Compressor over current thermal relay operation
UF Compressor over current start up locked
UH Current sensor error
U3 Discharge thermistor short/open
U4 Outdoor thermistor Short/Open
Mitsubishi Electric Mr Slim Split Systems Fault Basic
- Control Fault Codes
E0 Transmitting receiving signal error
P1 Intake air sensor abnormal
P2 Pipe sensor abnormal
P4 Drain sensor abnormal
P5 Malfunction of drain or overflow
P6 Abnormality of the coil frost/overheat protection
P7 System Error (address)
P8 Outdoor unit malfunction
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