Breakdown Self Diagnosis Function - Panasonic CS-E7GKEW Service Manual

15.1.1 Relationship between the condition of the air conditioner and pressure and
electric current
Condition of the
air conditioner
Insufficient refrigerant
(gas leakage)
Clogged capillary tube or
strainer
Short circuit in the indoor
unit
Heat radiation deficiency
of the outdoor unit
Inefficient compression
• Carry out the measurement of pressure, electric current, and temperature fifteen minutes after an operation is started.

15.2 Breakdown self diagnosis function

15.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code)
•
Once abnormality has occurred during operation, the unit will stop its operation, and Timer LED blinks.
•
Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown
condition, the LED will light up again.
•
In operation after breakdown repair, the Timer LED will no more blink. The last error code (abnormality) will be
stored in IC memory.
15.2.1.1 To make a diagnosis
1. Timer LED starts to blink and the unit automatically stops the operation.
2. Press the CHECK button on the remote controller continuously for 5 seconds.
3. "- -" will be displayed on the remote controller display. Note: Display only for "- -". (No transmitting signal, no
receiving sound and no Power LED blinking.)
4. Press the "TIMER" ▲ or ▼ button on the remote controller. The code "H00" (no abnormality) will be
displayed and signal will be transmitted to the main unit.
5. Every press of the button (up or down) will increase abnormality numbers and transmit abnormality code
signal to the main unit.
6. When the latest abnormality code on the main unit and code transmitted from the remote controller are
matched, power LED will light up for 30 seconds and a beep sound (continuously for 4 seconds) will be
heard. If no codes are matched, power LED will light up for 0.5 seconds and no sound will be heard.
7. The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5
seconds or operating the unit for 30 seconds.
8. The LED will be off if the unit is turned off or the RESET button on the main unit is pressed.
"Check" button
Cooling Mode
Low Pressure High Pressure
For CS-E7, 9, 12, 15GKEW
And CS-E7, 9, 12, 15GKDW
Electric current
Low Pressure
during operation
For CS-E18GKEW
And CS-E18GKDW
55
Heating Mode
Electric current
High Pressure
during operation
"Check" button