LITE
EN
Symptom
• If the unit does not come on or the
display and the unit go off during
operation.
• When the unit starts up or runs,
the display switches between E0
and CA (return air sensor failure).
The unit works during this error, but
without return air sensor regulation
(and the temperature cannot be
changed). Press the On/Off button
on the control panel or remote
control once to turn off.
• When the unit starts up or runs, it
gives out a beeping sound followed
by the display showing Lb (battery
running low). The unit shuts down
automatically.
All manuals and user guides at all-guides.com
• Power fuse disconnected or blown.
• Electronic control defective.
• Power cable disconnected, with poor
contact or cut.
• Electronic control power fuse (10A)
disconnected or blown.
• Power cable polarity inverted.
• Poor connection in return air sensor
cables or terminals.
• Return air sensor disconnected or faulty.
• Poor contact in power terminals or
connections.
• Battery discharged or defective.
18
Cause
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