SERVICE MANUAL - Mitsubishi Heavy Industries Ltd.
SERVICE MANUAL - Mitsubishi Heavy Industries Ltd.
SERVICE MANUAL - Mitsubishi Heavy Industries Ltd.
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1 Error display : e5 [Communications error during operation]<br />
Indoor unit<br />
Outdoor unit<br />
Red LED<br />
2 time flash Red LED<br />
2 time flash<br />
Green LED Keeps flashing Green LED Keeps flashing<br />
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.<br />
Is the connection<br />
of the signal wires at the<br />
outdoor unit poor?<br />
YES<br />
(1) (2)<br />
NO<br />
Is the connection<br />
of the signal wires at the<br />
indoor unit poor?<br />
Repair Repair<br />
NO Reset power<br />
Did the remote “ WAIT ” “ WAIT ”<br />
controller’s LCD return<br />
supply.<br />
to normal?<br />
Go to display diagnosis (page 140).<br />
YES YES<br />
The unit is normal.<br />
Malfunction was due to<br />
transient noise, etc.<br />
Notes (1) Check for poor connections (disconnection, looseness) on the outdoor unit’s terminal block.<br />
(2) Check for poor connections or disconnection of the signal lines between the indoor and outdoor units.<br />
Red LED<br />
Green LED<br />
Indoor unit<br />
2 time flash<br />
Keeps flashing<br />
Red LED<br />
Outdoor unit<br />
Stays OFF<br />
Green LED Keeps flashing<br />
Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.<br />
Reset power supply. Did it return to normal?<br />
NO<br />
Outdoor unit’s control PCB is<br />
faulty. (Network communications<br />
circuit is faulty.) Replace<br />
- 25 -<br />
YES<br />
Malfunction is due to noise, etc.<br />
(The outdoor unit’s CPU went<br />
out of control due to noise during<br />
power on.)<br />
2 Error display : e32 [Power supply phases reversed] [Only case of 301~601 type]<br />
Red LED<br />
Green LED<br />
Indoor unit<br />
Stays OFF<br />
Keeps flashing<br />
Are the power supply<br />
phases reversed?<br />
NO<br />
Are the connections<br />
to the reverse phase detection<br />
circuit lines correct?<br />
YES<br />
YES<br />
NO<br />
Outdoor unit’s control PCB is faulty.<br />
Replace<br />
(Reverse phase detection circuit is faulty.)<br />
Red LED<br />
Outdoor unit<br />
1 time flash<br />
Green LED Keeps flashing<br />
Repair<br />
Repair
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