Panasonic CS-ME7CKPG Service Manual page 39

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9.1.12. Self Diagnosis display
The diagnostic displays that appear when trouble has occurred can be checked using the remote control unit.
When trouble occurs, operation is stopped automatically, and the timer lamp blinks. The diagnosis time has been reduced by
warning the user by means of the blinking of the timer lamp.
· When trouble occurs, operation is stopped automatically, and the timer
lamp blinks.
· The timer lamp will go off if the power is turned off, but it will start
blinking again if the air conditioner is operated with the trouble left
unremedied.
· No diagnostic displays will appear when the unit is operated after the
trouble has been remedied. However, the last diagnostic symbol is
stored in the IC´s memory. (This symbol can be cleared.)
· When the air conditioner protection operation is triggered because the
air conditioner is being operated under overload conditions, its heat
radiation is being interfered with or anti-freezing operation is initiated or
because its supply voltage has dropped or its power has been turned
off and then back on during operation, for instance, no diagnostic
displays will appear. However, F99 and other such information are
stored in the IC´s memory: this is normal and not indicative of
malfunctioning.
· The diagnostic displays appear automatically when trouble
occurs.
1. Operation is stopped automatically.
2. The timer lamp of the display unit on the right side of the indoor
unit blinks.
3. The timer lamp goes off when the power is turned off.
· To display the trouble (or protection operation) status stored in
the memory
1. Turn on the power.
2. Open the remote control unit´s door, and press the timer setting
"UP-ARROW" button for 5 seconds.
3. Press the "UP-ARROW" button slowly and repeatedly until 4
beeps are heard continuously from the indoor unit.
4. The 3-digit alphanumeric display on the remote control unit
indicates the trouble which has occurred.
* If the 3-digit alphanumeric display on the remote control unit
and the nature of the trouble match, the operation lamp
(green) will light.
· To clear the trouble (or protection operation) status stored in the
memory after remedial action has been taken
1. The air conditioner is reset by turning its power off and back on.
* If it is not reset by turning its power off and back on, remove
the battery cover from the remote control unit. The air
conditioner can then be forcibly reset by shorting the
"RESET" terminals toward the main unit (one receiving beep).
· Concerning emergency operation (which can be performed in
some of the trouble conditions)
1. Using the remote control unit, select COOL or HEAT, and press
the operation OFF/ON button. (4 receiving beeps are heard, and
the timer lamp blinks.)
2. The air conditioner can now be used temporarily until its trouble is
remedied.
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