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
Summary of Contents for CSU 12HCAA
Page 48: ...2005 12 20...
Page 49: ......
Page 57: ...9 59...
Page 59: ...11 59...
Page 60: ...12 59...
Page 61: ...13 59...
Page 62: ...14 59...
Page 63: ...15 59...
Page 64: ...16 59...
Page 65: ...17 59...
Page 66: ...18 59...
Page 67: ...19 59 Installation Guide 4 Indoor unit and outdoor unit explosion diagram and spare parts list...
Page 68: ...20 59 CS 23H3 V77AY1A CS 25H3 V AY1A CS 32H3 V AH4 INDOOR UNIT...
Page 69: ...21 59 CS 51H3 H AH1 INDOOR UNIT...
Page 70: ...22 59 CS 66H3 N AS INDOOR UNIT...
Page 71: ...23 59 CS 88H3 Q AT INDOOR UNIT...
Page 72: ...24 59 KFR 23GW AC CS 25H3 V AY1A OUTDOOR UNIT...
Page 73: ...25 59 CS 32H3 V AH4 OUTDOOR UNIT...
Page 74: ...26 59 CS 51H3 H AH1 OUTDOOR UNIT...
Page 75: ...27 59 CS 66H3 N AS OUTDOOR UNIT...