8. Service Mode
8.1. Self-Diagnosis and Special Mode Setting
8.1.1. Self-Diagnosis Functions
Self-Diagnosis Function provides information for errors to service personnel by “Self-
Diagnosis Display” when any error has occurred.
U**, H** and F** are stored in memory and held.
You can check latest error code by transmitting [0] [1] of Remote Controller in Service Mode.
Automatic 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
Automatic FL display
U30 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.
U59 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 speed for
the first 5 minutes. For the
remaining 25 minutes, fan motor
is also stopped.) The event is
saved in memory as well.
No display
“U59 is displayed for 30
minutes.
U61 The unit is carrying
out its recovery
process.
No display
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