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Flex + Series
25
12.2 Problem Handling
The conditions listed below are not classified into errors.
Conditions Causes
The unit does
not run
When restart the unit soon after
it is stopped
The overload protection switch of the unit let
the startup delayed for three minutes
As soon as power supply is on
The unit will stand by for approximate one
minute
The unit blows
out mist
When the cooling operation
starts
The hi-humidity air indoor is cooled quickly
The unit
generates noise
The unit “clatters” as soon as it
starts running
It is the sound generated during the
initialization of the electronic expansion
valve
The unit “swishes” during the
cooling operation
It is the sound when the refrigerant gas runs
inside the unit
The unit “swishes” when it is
started or stopped
It is the sound when the refrigerant gas stops
running
The unit “swishes” when it is in
and after the running
It is the sound when the draining system is
operating
The unit “squeaks” when it is in
and after the running
It is the sound of frication generated by the
skin plate etc which swells due to the
temperature change
The unit blows
out dust
When the unit restarts after it is
not used for a long time
The dust inside the unit is blown out again
The unit emits
odors
When the unit is running The odors absorbed in are blown out
12.3 Error Description
If some error occurs when the unit is running, the error code will be displayed and check for
more details about the meaning of each error.
Errors of definition
Main control display for outdoor unit
Indoor
unit code
Testing
board code
Yellow LED Red LED Green LED
The compressor is startup Flash 1 time
IPM current protection Flash 3 times
H5 H5
IPM temperature protection Flash 5 times
P8 P8
PFC current protection Flash 7 times
HC
PFC temperature protection Flash 8 times
P8 P8
Low voltage protection Flash 9 times
PL PL
High voltage protection Flash 10 times
PH PH
Low pressure protection Flash 11 times
E3
High pressure protection Flash 12 times
E8
High pressure switch protection Flash 13 times
E1
Capacitor charging error Flash 14 times
PU
AC current protection Flash 15 times
E5 E5
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