Midea CSU 12HCAA, Руководство по установке и обслуживанию

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34
installation & Maintenance Manual
C.inspection on indoor electric control board
D. Inspection of outdoor unit
Compressor and outdoor fan don't operate (only indoor fan operates)
indoor remoter controller doesn`t work, at the same time, the operation pilot lamp
is not lit when the emergency switch is pressed button
Carefully check the
components side
and the circuit of
electric control board
on indoor unit
Replace fuse
Is fuse F11 Fuse melt down
Is varistor NR11 burn out
Replace varistor
NO
YES
1.switch on the power
2.measure voltage between
TAB2 and optional pole of
protector tube
for 9K/12K
/ LN of the terminal board
for 18K/24K)
Fault of electric
control board
Is the voltage
close to 220V
Power fault
start
check outdoor fan motor and compressor
YES
press emergency switch: (at
this moment,3 minute delay
mode starts, test running
time is 30 minutes)
measure voltage between 2
and N of outdoor unit
terminals bed to see if it is
220V
measure voltage between 2
and N of indoor terminals to
see if it is 220V
replace indoor electric
control board
NO
check indoor and outdoor connection
wires to see if they are normal
NO
YES
YES
NO
NO
YES
VII.Troubleshooting