10. P4 malfunction
When
compressor discharge temperature is higher than 115°C, the unit will stop, and unit runs again when
compressor discharge temperature is lower than 90°C.
P4 display
Temperature protection of
compressor discharge
Check whether the
compressor discharge temp.
is more than 115°C ?
Check whether the wiring
connection is right between
compressor discharge temp.
sensor and PCB according
to wiring diagrams?
Method: Check whether the
resistance of compressor
discharge temp. sensor is
right refer to the
Appendix
2
No
Yes
Yes
Trouble is solved
No
Judge: The
discharge temp.
sensor is broken
Check whether the
refrigerant is leak
Correct the wiring connection
Stop leaking and add refrigerant
Replace the compressor discharge temp. sensor
No
Yes
Replace outdoor main board
Yes
Service manual
Inverter HF
76
Summary of Contents for MUCR-HF
Page 5: ...Part 2 Indoor Units Super Slim Cassette Type 6 Duct Type 20 Service manual Inverter HF 5 ...
Page 11: ...2 Dimensions Model A H MUCSR 48 HF 287 317 287 317 MUCSR 60 HF Service manual Inverter HF 11 ...
Page 12: ...3 Service Space 1000mm 1000mm 1000mm 1000mm Service manual Inverter HF 12 ...
Page 13: ...4 Wiring Diagrams MUCSR 48 HF UI20605 MUCSR 60 HF UI20606 Service manual Inverter HF 13 ...
Page 26: ...4 Wiring Diagrams MUCR 48 HF UI20601 MUCR 60 HF UI20602 Service manual Inverter HF 26 ...
Page 64: ... Part 5 1 Troubleshooting 65 Troubleshooting Service manual Inverter HF 64 ...
Page 69: ...3 E3 malfunction Service manual Inverter HF 69 ...
Page 70: ...4 E4 malfunction NOTA Revisar todas las sondas Service manual Inverter HF 70 ...
Page 73: ...7 P1 malfunction Service manual Inverter HF 73 ...
Page 74: ...8 P2 malfunction Service manual Inverter HF 74 ...
Page 75: ...9 P3 malfunction Service manual Inverter HF 75 ...
