8.1 Self-Diagnosis Functions
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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 display
U12 Remote control code
error
Display appears when
main unit and remote
controller codes are
not matched.
No display
“*” is remote controller code of the main
unit.
Display for 5 seconds.
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 displayed for 30 minutes.
U99 Hang-up Displayed when
communication error
has occurred between
Main microprocessor
and Timer
microprocessor.
No display
Displayed is left until the [POWER] key
is pressed.
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