Panasonic CU-E10HBEA

60
17.2. Self Diagnosis Function (CU-3E18LBE and CU-4E23LBE)
• 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 6LED 5LED 4LED 3LED 2LED 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
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
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
H33 Indoor /
outdoor
misconnection
abnormality
— — Indoor and outdoor
rated voltage
different
• Indoor and
outdoor units
check
H36 Outdoor gas
pipe
temperature
sensor
abnormality
Continuous
for 5s
Heating
protection
operation only
Outdoor gas pipe
temperature sensor
open or short circuit
• Outdoor gas pipe
temperature
sensor lead wire
and connector
H37 Outdoor liquid
pipe
temperature
sensor
abnormality
Continuous
for 5s
Cooling
protection
operation only
Outdoor liquid pipe
temperature sensor
open or short circuit
• Outdoor liquid
pipe temperature
sensor lead wire
and connector