Midea CSU 12HCAA, Руководство по установке и обслуживанию

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33
installation & Maintenance Manual
Indoor unit is able to operate when the emergency switch is pressed, but unable
to operate with remote controller.
A.Inspection of indoor fan motor
(apply only to 9K/12K)
B. Inspection on the receiver circuit board
Trun off power, check socket CN211
is the wire connected well
Pull out the wire from socket CN211 of indoor
circuit board, measure DCresistor value
between wire - and -
Are the weld point all reght
connect wire
no
Re-weld
yes
Resistance is 0V (short circuit)
or (open circuit)
Replace indoor fan motor
yes 0 or
Replace indoor
electric board
check the model of
remote controller
is the LCD clear
Take batteries out
and re-insert,
does the remote
controller work?
Replace batteries
no
Turn on a radio and switch to AM,
press remote controller button
Is there any noise in the radio
Is there any counter-phase fast
-start fluorescent lamp within 1 meter ?
yes
Replace remote controller
Keep indoor unit far away from
fluorescent lamp
Apply a filter on its receiving section
switch on the power, press on/off button on remote controller,
measure the voltage between NO.1 and NO.2 of the connector CN100 (9K/12K) : on the control board;
(18K) : measure the voltage between NO.1 and NO.2 of the connector LD101T on the control board;
(24K): measure the voltage between NO.3 and NO.5 of the connector CN70 on the control board;
is the voltage close to 4V DC
no 5V or 0V
Replace receiver
Replace indoor electric control board
yes
no
yes
no
yes
no
yes
no
yes
VII.Troubleshooting