2. E2 malfunction
Indoor / outdoor units communication error
E2 display
No
Power off, then turn on the unit 5
seconds later(reconnect the power
wire).Is the error still displaying
after several minutes?
Adopt shield cable/Shield
cable earthing.
No
Yes
Correct the connection.
No
Yes
Remove interference.
Increase the capacity of anti-
interference
Yes
Yes
Replace the signal wire.
Yes
Pull out and insert back.
No
No
Replace indoor PCB, is the error
distinguished?
Yes
Replace the outdoor PCB.
No
Check whether there’s any
interference.
Such as too many lamps, power
transformers? Or the signal wire
is too long?
Check whether the signal wire
is shield cable or whether the
shield cable is earthing?
Check whether the wire is
correct polarity? P to P, Q to Q,
E to E?
Check whether the signal wire
is broken?
Check whether the signal wires
insert on PCB well?
Service manual
Inverter HF
68
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 ...
