: Flashes in 2-sec intervals (normal) : On : Off : Flashes 3 times in 0.2-sec intervals
Status of
indoor/
outdoor units
Indication
by LED on
outdoor
unit
Indication by operation lamp on indoor unit
Content of diagnosis
Main category Sub-category
Inspection location/method Remedy
Lighting pattern at the time of timer lamp lighting
Off for 5 seconds
Main
category
Sub
category
Malfunction No.
*3: The content of diagnosis is transferred to the indoor unit via serial communication, but it does not trigger a complete shutdown operation. Number of repetition °: No complete shutdown
(1) Check the wires between units.
(1)
Check the indoor unit fan motor for proper
rotating operation. (Check for fan lock.)
(2) Check the lead wire of the indoor unit fan
motor for open-circuit.
(3) Check CN8 of the indoor unit fan motor
for secure installation.
(4) No abnormality found in above inspec-
tions (1) through (3).
(1) Replace the indoor unit fan motor.
(2) Replace the indoor unit fan motor.
(3) Correct the installation of CN8 of
the indoor unit fan motor.
(4) Replace the indoor unit control
PWB.
(1) Error in data read from the indoor unit
EEPROM
(1) Replace the indoor unit control
PCB.
(1) Correct the wiring.
(1) Check the wires between units.
(1) Correct the wiring.
Serial short circuit
Erroneous serial
wiring
Indoor unit fan er-
ror
EEPROM data
error
Operation lamp
Cluster lamp
Operation lamp
Cluster lamp
Operation lamp
Cluster lamp
Operation lamp
Cluster lamp
Wires between
units
Indoor unit fan
Indoor unit
control PWB
Indoor/
outdoor units
in operation
Indoor/
outdoor units
in complete
shutdown
Indoor unit in
operation
Outdoor unit
in temporary
stop
18 0
19 0
20 0
1
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