Troubleshooting Guide; Self Diagnosis Function - Panasonic PAPAMY1604017CE Service Manual

15. Troubleshooting Guide

15.1 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.
Abnormality
Diagnosis or
LED 6 LED 5 LED 4 LED 3 LED 2 LED 1
display protection
control
H11 Indoor/outdoor
abnormal
communication
H12 Indoor unit
capacity
unmatched
H15 Compressor
temperature
sensor
abnormality
H16 Outdoor
current
transformer
(CT)
abnormality
H27 Outdoor air
temperature
sensor
abnormality
H28 Outdoor heat
exchanger
temperature
sensor 1
abnormality
H32 Outdoor heat
exchanger
temperature
sensor 2
abnormality
H33 Indoor/
outdoor
misconnection
abnormality
H36 Outdoor gas
pipe
temperature
sensor
abnormality
Abnormality
judgement
O After
operation for
1 minute
O 90s after
power supply
O O Continuous
for 5s
O O
O O Continuous
for 5s
O O O Continuous
for 5s
O Continuous
for 5s
O O
O O Continuous
for 5s
30
Protection
operation
Indoor fan only Indoor/outdoor
operation can communication not
start by establish
entering into
force cooling
operation
― Total indoor
capability more than
maximum limit or
less than minimum
limit, or number of
indoor unit less than
two.
― Compressor
temperature sensor
open or short circuit
― ― Current transformer
faulty or compressor
faulty
― Outdoor air
temperature sensor
open or short circuit
― Outdoor heat
exchanger
temperature sensor 1
open or short circuit
― Outdoor heat
exchanger
temperature sensor 2
open or short circuit
― ― Indoor and outdoor
rated voltage
different
Heating Outdoor gas pipe
protection temperature sensor
operation only open or short circuit
Problem Check location
 Indoor/outdoor
wire terminal
 Indoor/outdoor
PCB
 Indoor/outdoor
connection wire
 Indoor/outdoor
connection wire
 Indoor/outdoor
PCB
 Specification and
combination table
in catalogue
 Compressor
temperature
sensor lead wire
and connector
 Outdoor PCB
faulty or
compressor
faulty
 Outdoor air
temperature
sensor lead wire
and connector
 Outdoor heat
exchanger
temperature
sensor 1 lead
wire and
connector
 Outdoor heat
exchanger
temperature
sensor 2 lead
wire and
connector
 Indoor and
outdoor units
check
 Outdoor gas pipe
temperature
sensor lead wire
and connector