-
238
-
(1) Selfdia
gnosis
function
(a) Chec
k
Indicator
T
ab
le
Whether a f
ailure e
xists or not on the indoor unit and outdoor unit can be kno
wn by the contents of the error code on the remot
e controller
, indoor/outdoor unit green LED (po
wer pilot
lamp and microcomputer normality pilot lamp) and red LED (check pilot lamp).
1) Indoor
unit
side
Outdoor unit LED
Indoor unit LED
Green
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
Red
Stays OFF
Stays OFF or Lights
continuously
Green
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
Stays OFF
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
K
eeps flashing
*3 time flash
Stays OFF
2 time flash
2 time flash
2 time flash
1 time flash
1 time flash
1 time flash
Stays OFF
Stays OFF
Red
Stays OFF
Normal
Indoor unit PCB f
ault
Outdoor unit microcomputer f
ailure
Indoor unit heat e
xchanger thermistor f
ailure
Indoor unit return air thermistor f
ailure
The float SW operates (with FS only). Drain up kit wiring f
ault.
Indoor / outdoor transmission error
.
Stays OFF
Stays OFF
Stays OFF
2 time flash
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Stays OFF
Remote
contr
oller
err
or code
No-indication
E1
E5
E6
E7
E9
E28
Cause
K
eeps flashing
K
eeps flashing
1 time flash
Stays OFF
E8
Stays OFF
Stays OFF
Stays OFF
Po
wer OFF
, L phase wiring is open, po
wer source f
ailure
Stays OFF
Remote controller wires X and
Y are connected in re
v
erse. *F
or wire breaking at
po
wer ON, LED is OFF
.
Remote controller wire is open. (X wire breaking :
A beep is produced and no
indication is made. Z wire breaking : No beep and no indication)
The remote controller wires
Y and Z are connected in re
v
erse.
LCD flashes
contin
uousl
y
or is off
.
K
eeps flashing
K
eeps flashing
Stays OFF
2 time flash
Loose connection or disconnection in wires connecting the indoor and outdoor
units.
When multiple remote controllers are used for control, the po
wer supply to some
indoor units is OFF
.
K
eeps flashing
K
eeps flashing
Stays OFF
Stays OFF
E10
The number of indoor units which is connected to a remote controller e
xceeds the
limitation (16 units at maximum).
Outdoor unit control PCB is f
aulty when the po
wer is turned on, or the in
v
erter
parts are f
aulty
.
Heating o
v
erload (indoor heat e
xchanger temperature is anomaly high) and/or
indoor heat e
xchanger thermistor is f
aulty
.
Remote controller thermistor f
ailure
K
eeps flashing
K
eeps flashing
Stays OFF
Stays OFF
E16
F
an motor is f
aulty (FDT
A 501, 601 type, FDKN type, FDTC type).
Communications are f
aulty between master and sla
v
e indoor units
K
eeps flashing
K
eeps flashing
3 time flash
Stays OFF
E14
1.6.3 Diagnosing of microcomputer circuit
