Service manual

Error Codes: System Malfunctions ESIE03–01
3–66 Part 3 – Troubleshooting
3
1
3
4
5
Troubleshooting 2 To troubleshoot, proceed as follows:
Caution Be sure to turn off power switch before connecting or disconnecting the connector, or parts damage
may occur.
Turn off the power
supply, disconnect the
NO.2 indoor-outdoor
transmission wire, and turn
power supply back on.
Is HAP flashing?
YES
YES
NO (ON or OFF)
NO (OFF)
NO
Is HAP flashing?
YES
NO
Is HAP flashing?
Continued from
previous page
Is HAP on?
Check of
outdoor unit
microcom-
puter normal
HAP
YES
Turn the power supply off
once and then back on.
Failure of indoor unit PCB.
Failure of outdoor unit PCB or
malfunction of power supply
system.
Indoor PCB malfunction.
Resets normally.
Could be outside cause (noise...).
Failure of outdoor unit PCB.
Resets normally.
Could be outside cause
(noise...).
"U4" displays
constantly?
YES
NO