Breakdown Self Diagnosis Function - Panasonic CS-CZ25ZKE Service Manual

17.3 Breakdown Self Diagnosis Function

17.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code)

Once error 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 ON again.

In operation after breakdown repair, the Timer LED will not blink. The last error code (abnormality) will be stored
in IC memory.
17.3.2 To Make a Diagnosis
1 Timer LED start 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"
The code "H00" (no abnormality) will be displayed and signal
will be transmitted to the main unit.
5 Each press of the button (
number and transmit error 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.
17.3.3 To Display Memorized Error (Protective Operation) Status
1 Turn power on.
2 Press the CHECK button on the remote control.
3 "- -" will be displayed on the remote control display.
Note: Display only for "- -" (No signal transmission, no receiving sound and no Power LED blinking)
4 Press the TIMER
displayed and signal will be transmit to the main unit.
5 Each press of the button (
main unit.
6 When the latest abnormality code on the main unit and code transmitted from the remote control 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 same diagnosis can be repeated by turning power on again.
17.3.4 To Clear Memorized Error Code after Repair (Protective Operation)
1 Turn power on (in standby condition).
2 Press the AUTO button for 5 seconds (a "beep" sound is heard) on the main unit to operate the unit at
Forced Cooling Operation Mode.
3 Press the CHECK button on the remote control for about 1 second with a pointed object to transmit signal to
main unit. A "beep" sound is heard, and the Error Code is cleared.
17.3.5 Temporary Operation (Depending On Breakdown Status)
1 Press the AUTO button (A beep receiving sound) on the main unit to operate the unit. (Remote control will
become possible.)
2 The unit can temporarily be used until repaired.
Error Code
H23
H27, H28
H26
or button on the remote controller.
or ) will increase error code
or button on the remote control. The code "H00" (no abnormality) will be
or ) will increase error code number and transmit error code signal to the
Operation Temporary items
Cooling
Emergency Operations
Cooling, Heating
with limited power
Cooling, Heating
"Check" button
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