50
17.3. Self Diagnosis Function
• The display screen of wireless remote control unit and the self-diagnosis LEDs (green) on the outdoor printed circuit board in the
outdoor unit can be used to identify the location of the problem.
Refer to the table below to identify and solve the cause of the problem, and then re-start the air conditioner system.
• If the problem is solved and operation returns to normal.
LED 1 illuminates and others LED are off.
LED 6 LED 5 LED 4 LED 3 LED 2 LED 1
Abnormality
judgement
Protection
operation
Problem
Check location
Diagnosis
display
Abnormality
or
protection
control
H11
Indoor/outdoor
abnormal
communication
After
operation for
1 minute
Indoor fan only
operation can
start by
entering into
force cooling
operation
Indoor/outdoor
communication not
establish
• Indoor/outdoor
wire terminal
• Indoor/outdoor
PCB
• Indoor/outdoor
connection wire
H12
Indoor unit
capacity
unmatched
90s after
power supply
—
Total indoor
capability more than
maximum limit or
less than minimum
limit, or number of
indoor unit less than
two.
• Indoor/outdoor
connection wire
• Indoor/outdoor
PCB
• Specification and
combination table
in catalogue
H14
Indoor intake
air temperature
sensor
abnormality
Continuous
for 5s
—
Indoor intake air
temperature sensor
open or short circuit
• Indoor intake air
temperature
sensor lead wire
and connector
H15
Compressor
temperature
sensor
abnormality
Continuous
for 5s
—
Compressor
temperature sensor
open or short circuit
• Compressor
temperature
sensor lead wire
and connector
H16
Outdoor
current
transformer
(CT)
abnormality
—
—
Current transformer
faulty or compressor
faulty
• Outdoor PCB
faulty or
compressor
faulty
H19
Indoor fan
motor
merchanism
lock
Continuous
happen for 7
times
—
Indoor fan motor lock
or feedback
abnormal
• Fan motor lead
wire and
connector
• Fan motor lock or
block
H23
Indoor heat
exchanger
temperature
sensor
abnormality
Continuous
for 5s
—
Indoor heat
exchanger
temperature sensor
open or short circuit
• Indoor heat
exchanger
temperature
sensor lead wire
and connector
H27
Outdoor air
temperature
sensor
abnormality
Continuous
for 5s
—
Outdoor air
temperature sensor
open or short circuit
• Outdoor air
temperature
sensor lead wire
and connector
H28
Outdoor heat
exchanger
temperature
sensor 1
abnormality
Continuous
for 5s
—
Outdoor heat
exchanger
temperature sensor 1
open or short circuit
• Outdoor heat
exchanger
temperature
sensor 1 lead
wire and
connector
H32
Outdoor heat
exchanger
temperature
sensor 2
abnormality
Continuous
for 5s
—
Outdoor heat
exchanger
temperature sensor 2
open or short circuit
• Outdoor heat
exchanger
temperature
sensor 2 lead
wire and
connector
Summary of Contents for CS-MRE12MKE
Page 15: ...15 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Remote Control ...
Page 16: ...16 5 Dimensions 5 1 Indoor Unit ...
Page 17: ...17 5 2 Outdoor Unit ...
Page 18: ...18 6 Refrigeration Cycle Diagram ...
Page 19: ...19 7 Block Diagram ...
Page 20: ...20 8 Wiring Connection Diagram 8 1 Indoor Unit ...
Page 21: ...21 8 2 Outdoor Unit ...
Page 22: ...22 9 Electronic Circuit Diagram 9 1 Indoor Unit ...
Page 23: ...23 9 2 Outdoor Unit ...
Page 24: ...24 10 Printed Circuit Board 10 1 Indoor Unit 10 1 1 Main Printed Circuit Board ...
Page 25: ...25 10 1 2 Power Printed Circuit Board 10 1 3 Indicator Printed Circuit Board ...
Page 26: ...26 10 2 Outdoor Unit ...
Page 79: ...79 18 1 3 To remove power electronic controller 18 1 4 To remove discharge grille ...
Page 80: ...80 18 1 5 To remove control board 18 1 6 To remove cross flow fan and indoor fan motor ...
Page 81: ...81 ...
Page 85: ...85 ...
Page 86: ...86 19 1 1 2 CS MRE9MKE ...
Page 87: ...87 ...
Page 88: ...88 19 1 2 Two Indoor Unit Operation 19 1 2 1 CS MRE7MKE x2 ...
Page 89: ...89 ...
Page 90: ...90 19 1 2 2 CS MRE9MKE CS MRE7MKE ...
Page 91: ...91 ...
Page 93: ...93 ...
Page 94: ...94 19 2 1 2 CS MRE9MKE ...
Page 95: ...95 ...
Page 96: ...96 19 2 1 3 CS MRE12MKE ...
Page 97: ...97 ...
Page 98: ...98 19 2 2 Two Indoor Unit Operation 19 2 2 1 CS MRE7MKE x2 ...
Page 99: ...99 ...
Page 100: ...100 19 2 2 2 CS MRE9MKE x2 ...
Page 101: ...101 ...
Page 102: ...102 19 2 2 3 CS MRE12MKE x2 ...
Page 103: ...103 ...