Remote
controller
Indoor
unit
Outdoor
unit
Remote
controller
Indoor
unit
Outdoor
unit
Normal
display
Normal
display
or
error display
(High pres-
sure error)
Normal
display
System does
not cool / heat.
Ball valve and 3 way-valve are
not fully opened.
Check the positions of spindle
(handel) of the 3-way valve and
ball valve.
Open the 3-way valve and ball
valves fully.
Controlling
display
(Operation
display LED
flashes)
Controlling
display (Oil
recovery
operation)
Normal
display
Indoor unit not
operating.
Oil recovery operation control is
in progress.
All indoor unit fans stop and the
signal sent from remote control-
ler is not accepted by indoor unit.
No display or
error display
(Cannot be
specified.)
Cannot be
specified.
No display or
error display
(Cannot be
specified.)
The fan of the
indoor unit
does not rotate.
System does
not cool / heat.
Indoor control PCB is faulty.
The symptom has many
branches, depending on the
error contents, and there is no
effective check method.
When the PCB or the connection
wiring is faulty, problem can
often be solved by replacing
the PCB.
Cannot be
specified.
No display
or error
display
(Cannot be
specified.)
Cannot be
specified.
Outdoor control PCB is faulty. The symptom has many
branches, depending on the
error contents, and there is no
effective check method.
When the PCB or the connection
wiring is faulty, problem can
often be solved by replacing
the PCB.
Normal
display
Normal
display
Normal
display
Drain hose is faulty.
Tilt the drain hose from the
indoor unit to the drain outlet.
The same symptom will also
appear when the drain hose is
clogged.
Error display
(Drain error)
Error display
(Indoor unit
error)
Error display
(Drain error)
Drain pump is faulty
(Cassette type only)
During cooling operation, drain
pump is not effective even though
a voltage (DC5V) is applied to
the terminal of CN5 (for wall
mounted and ceiling wall type:
CN4).
Generated when the float
switch does not return even
though 3 minutes have elapsed
after the operation signal was
sent from the float switch.
Float switch is faulty. Remove the float switch and
move the float up and down and
check the resistance.
When the float is lowered, the
circuit is open (high resistance)
and when the float is raised, the
circuit is closed (low resistance).
Remarks
Check method
(Error state check method)
Cause
Remarks
Check method
(Error state check method)
Cause
Occur when the float
switch does not return even
though 3 minutes have elapsed
after the operation signal was
sent from the float switch.
Symptom that
can occur other
than title
Symptom that
can occur other
than title
Body
LED
Body
LED
05-44
1st oil recovery operation: 1 hour
Operation LED flashes (3 sec.
ON, 1 sec. OFF and repeat).
(operation time) after the power
turned on. 2nd oil recovery opera-
tion and afterwards: every 6
hours (operation time).
The fan of the
indoor unit
does not rotate.
System does
not cool / heat.
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