Panasonic CS-LE9NKD / CS-LE12NKD / CU-LE9NKD / CU-LE12NKD Service Manual ▷ View online
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14.1.2 Relationship between the condition of the air conditioner and pressure and electric
current
Cooling Mode
Heating Mode
Condition of the
air conditioner
air conditioner
Low Pressure
High
Pressure
Pressure
Electric current
during
operation
during
operation
Low Pressure
High
Pressure
Pressure
Electric current
during operation
during operation
Insufficient
refrigerant
(gas leakage)
refrigerant
(gas leakage)
Clogged capillary
tube or
strainer
tube or
strainer
Short circuit in the
indoor unit
indoor unit
Heat radiation
deficiency
of the outdoor unit
deficiency
of the outdoor unit
Inefficient
compression
compression
• Carry out the measurement of pressure, electric current, and temperature fifteen minutes after an operation is
started.
started.
14.2 Breakdown Self Diagnosis Function
14.2.1 About Self Diagnosis
When the air-conditioner is stopped due to malfunction detected by itself, the operation can be restarted using AUTO
Switch on the indoor unit. In forced operation, the frequency for compressor and fan speed can not be changed and
the signal receiving sound is different.
Normal Operation ON: “pep”
Forced Operation ON: “pep”, “pep”, “pep”, “pep”
Stop: “pep”
Note: Refer to the Diagnosis Code Table for the malfunction when forced operation is not available.
Switch on the indoor unit. In forced operation, the frequency for compressor and fan speed can not be changed and
the signal receiving sound is different.
Normal Operation ON: “pep”
Forced Operation ON: “pep”, “pep”, “pep”, “pep”
Stop: “pep”
Note: Refer to the Diagnosis Code Table for the malfunction when forced operation is not available.
14.2.2 Display of Error Code
1. Keeping the CHECK button on the remote controller depressed for 5 seconds, error code ranging fromH11 to H99
can be displayed on the remote controller.
2. The error code is changed and diagnosis signal is transmitted to the indoor unit by pressing the Temp Up button on
the remote control.
3. When the malfunction of the air-conditioner matches the error code on the remote control, four beeps can be heard
from the indoor unit and the operation indicator will light up.
4. Keep the CHECK button depressed continuously for 5 seconds to cancel the diagnosis function.
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14.2.3 Error Codes Table
Code
Abnormality/Protection
Judgment
Check
Emergency
Operation
H00
Normal
H11
Indoor/Outdoor abnormal
communication
communication
>1 minute after starting
operation
operation
Connecting cable,
Indoor/outdoor PCB
Indoor/outdoor PCB
○
H14
Indoor intake air temp sensor
abnormality
abnormality
-
Intake air temperature
sensor(defected or
disconnected)
sensor(defected or
disconnected)
×
H15
Outdoor compressor
tempearture sensor abnormality
tempearture sensor abnormality
Continue for 5 sec.
Compressor tempeature
sensor(defected or
disconnected)
sensor(defected or
disconnected)
×
H16
Outdoor Current Transformer
open circuit
open circuit
-
Outdoor PCB, IPM module
×
H19
Indoor fan motor mechanism
lock
lock
-
Indoor PCB, fan motor
×
H23
Indoor heat exchanger
temperature A sensor
abnormality
temperature A sensor
abnormality
Continue for 5 sec.
Heat exchanger
temperature
sensor(defected or
disconnected)
temperature
sensor(defected or
disconnected)
○
H27
Outdoor air temperature sensor
abnormality
abnormality
Continue for 5 sec.
Outdoor temperature
sensor(defected or
disconnected)
sensor(defected or
disconnected)
○
H28
Outdoor heat exchanger
temperature sensor abnormality
temperature sensor abnormality
Continue for 5 sec.
Outdoor heat exchanger
sensor(defected
disconnected)
sensor(defected
disconnected)
○
H30
Discharge temperature sensor
abnormality
abnormality
Continue for 5 sec.
Discharge temperature
sensor(defected or
disconnected)
sensor(defected or
disconnected)
×
H33
Incorrect connection of
Indoor/Outdoor cable
Indoor/Outdoor cable
-
Indoor/outdoor supply
voltage
voltage
×
H97
Outdoor fan motor lock
Twice within 30 minutes Outdoor fan motor
×
H98
Indoor high pressure protection -
Air filter dirty
Air circulation short circuit
Air circulation short circuit
-
H99
Indoor heat exchanger anti-
freezing protection
freezing protection
Indoor heat exchanger
freezing
freezing
Insufficient refrigerant
Air filter dirty
Air filter dirty
-
F11
Cooling/Heating cycle
changeover abnormality
changeover abnormality
4 times occurrence
within 30 minutes
within 30 minutes
4-way valve
V-coil
V-coil
×
F90
PFC control
4 times occurrence
within 20 minutes
within 20 minutes
Voltage at PFC
×
F91
Refrigeration cycle abnormality
2 times occurrence
within 20 minutes
within 20 minutes
No refrigerant(3-way valve is
closed)
closed)
×
F93
Compressor abnormality
4 times occurrence
within 20 minutes
within 20 minutes
Compressor
×
F95
Cool high pressure protection
4 times occurrence
within 20 minutes
within 20 minutes
Outdoor refrigeration cycle
×
F96
IPM overheating protection
-
Excessive refrigerant
Improper heat radiation
IPM
Improper heat radiation
IPM
×
F97
Outdoor compressor
overheating protection
overheating protection
4 times occurrence
within 20 minutes
within 20 minutes
Insufficient refrigerant
Compressor
Compressor
×
F98
Total running current protection
3 times occurrence
within 20 minutes
within 20 minutes
Excess refrigerant
Improper radiation
Improper radiation
×
F99
Outdoor Peak Current
Protection Control
Protection Control
4 times occurrcnce
continuously within 30
minutes
continuously within 30
minutes
Outdoor PCB
IPM
Compressor
IPM
Compressor
×
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15. Technical Data
15.1 Operation Characteristics
15.1.1 CS-LE9NKD CU-LE9NKD
Cooling Characteristic at Different Outdoor Air Temperature
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Cooling Characteristic at Different Piping Length
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