MITSUBISHI ELECTRIC MSH-07NV - Manual (Page 51)

51
Yes
Yes
Check of indoor fan motor A
Check of receiver P.C. board B
Inodoor fan does not operate.
Repair the indoor fan motor.
Disconnect lead wires from connector CN211 on indoor electronic control P.C. board.
Measure resistance between lead wires No.1 and No.4 and then No.1 and No.2(MSH-18/24)
No.1 and No.3 and then No.2 and No.3(MSH-07/09/12)
Are lead wires connected?
Reconnect the lead wires.
Is soldered point nomal?
Replace the indoor electronic con-
trol P.C. board.
Resolder it.
Is resistance 0 (short circuit) or ∞ (open circuit)?
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller.
Replace the batteries.(see page 47.)
Turn on a radio to AM and press switch on
remote controller.
Is noise heard from radio?
Are there any fluorescent lights of
inverter or rapid-start type within
the range of 1m?
Measure the voltage between receiver P.C. board connector No.2 (+) and No.1(MSH-18/24)
indoor electronic control P.C. board connector LD101 No.2 and JPG(MSH-07/09/12)
when remote controller button is pressed.
Is the voltage approx. 4V DC? Replace the indoor electronic control P.C.
board.
Replace the receiver.
Replace the remote controller.
● Re-install the unit away from lights.
● Attach a filter on receiving part.
Yes ( 0 or ∞ )
No
(others)
Yes
No Yes
No
Check the model name of remote
controller.
Is LCD display on remote con-
troller visible?
Remove batteries and then set them back.
Check if the unit operates with remote
controller.
Yes
Does the unit operate with remote
controller?
Yes
OK
No
(not clear)
Yes
No
No
No(5V or 0V DC)
{ }
No
{ }
Turn OFF power supply.
Check connector CN211 visually.
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