10. Self-Diagnosis and Special Mode Setting
10.1. Self-Diagnosis Functions
Self-Diagnosis Function provides information for errors to service personnel by “Self-Diagnosis
Display” when any error has occurred.
U14, H** and F** are stored in memory and held.
Display on FL will be cancelled when the power is turned off or AC input is turned off during self-
diagnosis display is ON.
Error
Code
Diagnosis contents Description Monitor
Display
FL
U12 Remote control code
error
Display appears when main unit
and remote controller codes are
not matched.
No display
“*” is remote
code of the
Display for 5
U14 Abnormal inner
temperature detected
Display appears when the drive
temperature exceeds 70°C.
The power is turned off forcibly.
For 30 minutes after this, all key
entries are disabled. (Fan motor
operates at the highest speedfor
the first 5 minutes. For the
remaining 25 minutes, fan motor
is also stopped.) The event is
saved in memory as well.
No display
“U14” is
minutes.
U99 Hang-up Displayed when communication
error has occurred between Main
microprocessor and Timer
microprocessor.
No display
Displayed is
[POWER] key
H01 Inoperative fan motor Display appears when
inoperative fan motor is detected
after powered on.
The power is turned off when
detecting.
No display
Displayed is
14
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