89
PB
TROUBLESHOOTING
Diagnostic Codes
No. Malfunction
Name
Display Method of Indoor Unit
Display Method of Outdoor Unit
A/C status
Possible Causes
Dual-8
Code
Display
Indicator Display (During blinking,
ON 0.5s and OFF 0.5s)
Indicator has 3 kinds of display
status and during blinking, ON
0.5s and OFF 0.5s
Power
Indicator
Cool
Indica
-
tor
Heating
Indicator
Yellow
Indicator
Red Indi-
cator
Green
Indicator
36
module
temperate is
too high
H5
OFF 3s
and blink
5 times
OFF 1s
and blink
10 times
37
internal
motor ( fan
motor) does
not operate
H6
OFF 3s
and blink
11 times
Internal fan motor, external
fan motor, compressor
and electric heater stop
operation,guide louver
stops at present location.
1. Bad contact of DC motor
feedback terminal.
2. Bad contact of DC motor
control end.
3.Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard
rev detecting circuit.
38
desynchro
-
nizing of
compressor
H7
OFF 3s
and blink
7 times
During cooling and drying
operation, compressor will
stop while indoor fan will
operate; During heating
operation, the complete unit
will stop operation.
Refer to the malfunction
analysis (IPM protec
-
tion, loss of synchronism
protection and overcurrent
protection of phase current
for compressor.
39
PFC protec
-
tion
HC
OFF 3s
and blink
6 times
OFF 1s
and blink
14 times
During cooling and drying
operation, compressor will
stop while indoor fan will
operate; During heating
operation, the complete unit
will stop operation.
Refer to the malfunction
analysis
40
outdoor DC
fan motor
malfunction
L3
OFF 3s
and blink
23 times
OFF 1s
and blink
14 times
Outdoor DC fan motor mal-
function lead to compressor
stop operation,
DC fan motor malfunction
or system blocked or the
connector loosed
41
power
protection
L9
OFF 3s
and blink
20 times
OFF 1s
and blink
9 times
compressor operation
stops and Outdoor fan
motor will stop 30s later , 3
minutes later fan motor and
compressor will restart
To protect the electronical
components when detect
high power
42
indoor unit
and outdoor
unit don’t
match
LP
OFF 3s
and blink
19 times
OFF 1s
and blink
16 times
compressor and Outdoor
fan motor don’t work
Indoor unit and outdoor unit
don’t match
43
failure start
up
LC
OFF 3s
and blink
11 times
During cooling and drying
operation, compressor will
stop while indoor fan will
operate; During heating
operation, the complete unit
will stop operation.
Refer to the malfunction
analysis
Содержание MRM09Y1J
Страница 8: ...8 INTRODUCTION MWM09Y1J MWM12Y1J Figure 101 Indoor Units MWM18Y3J MWM24Y3J MWM36Y3J...
Страница 37: ...37 OPERATION 18 24kSequenceofOperation...
Страница 38: ...38 OPERATION 18 24k Sequence of Operation O o 0 C L A B C D 1 1 4...
Страница 39: ...39 OPERATION 18 24k Sequence of Operation...
Страница 40: ...40 OPERATION 18 24k Sequence of Operation...
Страница 41: ...41 OPERATION 18 24k Sequence of Operation...
Страница 47: ...47 INSTALLATION...
Страница 48: ...48 INSTALLATION Installation Tools...
Страница 95: ...95 TROUBLESHOOTING Malfunction of IDU Fan Motor U8 Service Manual No Start End...
Страница 113: ...113 WIRING DIAGRAMS Figure 804 36K Indoor Unit Wiring Diagrams Figure 803 24K Indoor Unit Wiring Diagram 6361000043101...
Страница 116: ...116 FIgure 901 PARTS CATALOG Indoor Unit MWM09Y1J MWM12Y1J MWM09Y1J MWM12Y1J...
Страница 118: ...118 FIgure 902 PARTS CATALOG Indoor Unit MWM18Y3J MWM24Y3J...
Страница 123: ...123 FIgure 904 PARTS CATALOG Outdoor Unit MRM09Y1J MRM12Y1J MRM09Y1J MRM12Y1J...
Страница 126: ...126 PARTS CATALOG Outdoor Unit MRM18Y3J FIgure 905...
Страница 128: ...128 PARTS CATALOG Outdoor Unit MRM24Y3J FIgure 906...
Страница 130: ...130 PARTS CATALOG Outdoor Unit MRMY36J FIgure 907 2 9 10 18 20 21 11 12 14 15 22 23 26 27 32 34 4 1...