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VII.Troubleshooting
4. Fault standards of main components
Name of
component
Room
use instruments to measure the resistor (at 10-30 )
temperature
thermistor
and pipe
temperature
8K ~20K
thermistor
use instruments to measure the resistor (winding temperature at 20
CSU-09HHAA
commpressor
use instruments to measure the resistor between connecting terminals (winding
temperature at 10-30 )
white-
black
black-
red
indoor fan
motor
brown-yellow
yellow-gray
Use instruments to measure the resistor between connecting terminals
(winding resistance at 10-40 )
outdoor
fan motor
315 ~385
(yellow-
use instruments to measure the resistor (when at 10-30
stepper
Normal
motor
~
Test methods and standards
Normal
Abnormal
short circuit or open circuit
Normal
CSU-12HHAA
3.528
2.0
2.510
4.61
12K
5K-9K
267 ~
267 ~
295 ~
295 ~
Connect power, test voltage of cable
Normal
~
fan turns once
Normal
5K-9K
12K
~
(red-blue)
(red-blue)
~308
~
blue
)
(yellow-
blue
Abnormal
short circuit or open circuit
installation & Maintenance Manual
CSU-21HHAA
CSU-24HHAB
1.04
0.885
2.860
1.773
Normal
18K-21K
218 ~
~
Abnormal
keep 0V
or 5V
0V 5V 0V
24K
18K-21K
76 ~93
33 ~40
(red-blue)
(red-blue)
81 ~
58 ~70
)
(yellow-
blue
)
(yellow-
Normal
short circuit or open circuit
350 ~400
32
Abnormal
short
circuit
or open
circuit
Abnormal
24K
short
circuit
~138
or open
circuit
87 ~107
Abnormal
short
circuit
or open
circuit
blue
)
Abnormal
Schematic
diagram
WHI
compressor
RED
BLU
5K-21K:
WHI
RED
BLU
fan
motor
YLW
GRAY
BRN
24K:
WHT
BLK
BLU
YLW
RED
ORG
yellow
red
fan
motor
blue
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