SERVICE MANUAL - Mitsubishi Heavy Industries Ltd.
SERVICE MANUAL - Mitsubishi Heavy Industries Ltd.
SERVICE MANUAL - Mitsubishi Heavy Industries Ltd.
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12 Error display : e47 [Inverter over-voltage trouble] (Only case of 151~251 type)<br />
13<br />
Red LED<br />
Green LED<br />
Indoor unit<br />
Stays OFF<br />
Keeps flashing<br />
Is there foreign matter YES<br />
such as dust or dirt on the soldered<br />
surfaces of the control PCB?<br />
NO<br />
Is the fuse (F1: 250V, 20A)<br />
blown?<br />
NO<br />
The outdoor unit control<br />
PCB is faulty. Replace<br />
Error display : e48<br />
Red LED<br />
Green LED<br />
Is any foreign<br />
object wedged into the<br />
rotating parts of the<br />
fan motor?<br />
NO<br />
Remove the foreign object.<br />
YES<br />
YES<br />
Indoor unit<br />
Stays OFF<br />
Keeps flashing<br />
Turn the<br />
fan by hand several<br />
revolutions. Does itturn<br />
smoothly?<br />
NO<br />
Replace the fan motor.<br />
Red LED<br />
Outdoor unit<br />
1 time flash<br />
Remove the foreign matter<br />
such as dust and dirt.<br />
YES<br />
Replace<br />
[DC Fan motor abnormal] (Only case of 151~251 type)<br />
Outdoor unit<br />
Red LED 1 time flash<br />
Is there<br />
foreign matter<br />
such as dust or dirt on<br />
the soldered surfaces<br />
of the control<br />
PCB?<br />
NO<br />
Remove the foreign mater<br />
such as dust or dirt.<br />
- 31 -<br />
● Display Conditions<br />
If the inverter voltage exceeds 340V, (3 times in 20 minutes),<br />
this error is displayed. After 3 minutes passes, it<br />
can be reset using the remote controller.<br />
YES<br />
Is fuse F3<br />
(250V, 1A)<br />
blown?<br />
NO<br />
Replace the fuse.<br />
● Display conditions<br />
When the DC fan motor’s output is ON, if the fan motor’s speed drops to 75 rpm or lower continuously<br />
for 30 seconds or longer, the compressor stops. After a 3-minute delay, the compressor is restarted, but<br />
if this state is detected 5 times within 60 minutes.<br />
14<br />
Error display : e52<br />
Red LED<br />
Green LED<br />
Indoor unit<br />
Stays OFF<br />
Keeps flashing<br />
Is E52<br />
Cooling operation<br />
E52 Heating operation<br />
displayed in the remote<br />
controller’s<br />
screen?<br />
[52C Abnormal] (Only case of 301~601 type)<br />
YES<br />
Red LED<br />
Outdoor unit<br />
Lights contiously<br />
Green LED Keeps flashing<br />
The 52C is abnormal.<br />
YES<br />
Replace the outdoor<br />
unit control PCB.
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