Panasonic PAPAMY1702034CE - Troubleshooting Guide; Self Diagnosis Function

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16. Troubleshooting Guide
16.1 Self Diagnosis Function
Diagnosis
display
Abnormality or
protection control
Abnormality judgment Protection operation Problem Check location
H11
Indoor/outdoor abnormal
communication
After operation for
1 minutes
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
H64
Outdoor high pressure
sensor abnormality
Continuous for 1 minute -
High pressure sensor
open circuit during
compressor stop
 High pressure sensor
 Lead wire and connector
H67 Nanoe abnormality
Nanoe stop for 5 minutes
for 3 times
- Nanoe faulty
 PCB
 Nanoe system
 High voltage
H70 Light sensor abnormality
Continuous for 24 hours,
15 days
-
Light sensor open or
short circuit
 Light sensor (defective or
disconnect)
H97
Outdoor fan motor
mechanism lock
2 times happen within
20 minutes
-
Outdoor fan motor
lock or feedback
abnormal
 Outdoor fan motor lead
wire and connector
 Fan motor lock or block
H98
Indoor high pressure
protection
- -
Indoor high pressure
protection (Heating)
 Check indoor heat
exchanger
 Air filter dirty
 Air circulation short circuit
H99
Indoor operating unit
freeze protection
- -
Indoor freeze
protection (Cooling)
 Check indoor heat
exchanger
 Air filter dirty
 Air circulation short circuit
F11
4-way valve switching
abnormality
4 times happen within
30 minutes
-
4-way valve switching
abnormal
 4-way valve
 Lead wire and connector