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Alarm condition: before being electrified, EEPROM
is faulty or the data is missing.
The indication on indicator board sequence is
LED5-LED4-LED3-LED2-LED1, 0: OFF; 1: ON
2) EEPROM failure
outdoor failure indicator
shows 01110
modify the
welded point
yes
check the EEPROM
welded point on outdoor
PCB is normal
EEPROM data is
missing, replace
PCB
no
no
Replace outdoor
PCB
re-wiring
no
Replace indoor PCB
Check if communication wiring
between indoor and outdoor is
correct and if power wiring is
correct
If communication wire is
damaged or broken off
yes
LCD of wall mounted displays
E7
no
yes
check if the failure
is eliminated
yes
3
) Communication error between indoor and outdoor units
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