Panasonic CS-A18CKE / CU-A18CKE / CS-A24CKE / CU-A24CKE Service Manual ▷ View online
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• Remote Control Reset
When the batteries are inserted for the first time, or the
batteries are replaced, all the indications will blink and the
remote control might not work.
batteries are replaced, all the indications will blink and the
remote control might not work.
If this happen, remove the cover of the remote control and
you will find a resetting terminal, and by shorting it with a
minus screwdriver, it will return to normal.
you will find a resetting terminal, and by shorting it with a
minus screwdriver, it will return to normal.
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• Changing the wireless remote control transmission
code
When two indoor units are installed in the same room, in
order to prevent operating errors caused by using two
remote controls, cut a jumper wire at the remote control
printed circuit board (J - A) and cut a jumper wire at the
indoor printed circuit board (JX4). It is possible to select
from 4 types of transmission codes including one at time of
delivery condition (0).
order to prevent operating errors caused by using two
remote controls, cut a jumper wire at the remote control
printed circuit board (J - A) and cut a jumper wire at the
indoor printed circuit board (JX4). It is possible to select
from 4 types of transmission codes including one at time of
delivery condition (0).
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CS-A18CKE CU-A18CKE / CS-A24CKE CU-A24CKE
In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table on the right.
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table on the right.
13 Troubleshooting Guide
13.1. Refrigeration cycle system
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CS-A18CKE CU-A18CKE / CS-A24CKE CU-A24CKE
13.1.1. Relationship between the condition of the air conditioner and pressure and
electric current
Cooling Mode
Heating Mode
Condition of the air
conditoner
Low Pressure
High Pressure
Electric current
during operation
Low Pressure
High Pressure
Electric current
during operation
Insufficient refrigerant
(gas leakage)
(gas leakage)
Clogged capillary tube
or Strainer
or Strainer
Short circuit in the
indoor unit
indoor unit
Heat radiation
deficiency of the
outdoor unit
deficiency of the
outdoor unit
Inefficient compression
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• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.
13.1.2. Diagnosis methods of a malfunction of a compressor and 4-way valve
Nature of fault
Symptom
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• Electric current during operation becomes approximately 20% lower than the normal value.
Insufficient compressing of a compressor
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• The discharge tube of the compressor becomes abnormally hot (normally 70 to 90°C).
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• The difference between high pressure and low pressure becomes almost zero.
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• Electric current reaches a high level abnormally, and the value exceeds the limit of an
ammeter. In some cases, a breaker turns off.
Locked compressor
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• The compressor is a humming sound.
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• Electric current during operation becomes approximately 80% lower than the normal value.
Insufficient switches of the 4-way valve
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• The temperature different between from the discharge tube to the 4-way valve and from
suction tube to the 4-way valve becomes almost zero.
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CS-A18CKE CU-A18CKE / CS-A24CKE CU-A24CKE
14 Technical Data
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CS-A18CKE CU-A18CKE / CS-A24CKE CU-A24CKE
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