Specifications

1037
FDC-HKXR
1) The cumulative operating time of the compressor
comes up to 45 minutes after completion of a
defrosting operation, or it comes up to 30 minutes
after a heating operation starts (the remote controller
is turned on).
2) Five minutes has passed after the compressor was
turned off and on.
3) Five minutes has passed after end of outdoor unit
fan motor control.
4) After all the above conditions have been met, the
temperature of the heat exchanger sensor (Th
O-
R)
has been below the defrosting start temperature
for three minutes in succession.
(11) Defrosting
Initiation temp. of defrosting (Case of ON SW
3-2
)
Initiation temp. of defrosting (Standard)
Zone for initiate temp. of defrost
-20°C -15°C -10°C -5°C 0°C 5°C 10°C
-5°C
-10°C
-2°C
-15°C
-20°C
Outdoor unit heat exchanger temp.
(Th
O-R)
Outdoor air temperature (ThO-A)
(b) Operation of functional components in defrosting
(a) Conditions for starting defrosting
When all the following conditions are met, the defrosting operation will start:
Defrosting start
Defrosting
Finishing of
defrosting,
start defrosting
Finishing of
defrosting
Heating
1 min.
1 min.
4 min.
Frequency
Target Hz
Outdoor unit fan ON
or
OFF
ON
or
OFF
ON
or
OFF
ON
or
OFF
ON
or
OFF
5 sec.
5 sec.
ON
ON
or
OFF
[Indoor unit electronic
expansion valve (EEV)]
Heating unit
(include, pause)
to Hz
<Pause, stop>
(Open of about
7%)
to Hz
<Pause, stop>
(Open of about 7%)
Full open
Full open
Full open
COOL, DRY unit
(include, pause)
to Hz
<Pause, 0>
Closed
to Hz
<Pause, Closed>
FAN unit,
Stop unit and COOL, DRY unit
Closed, 0
Closed
ON
or
OFF
Heating
Heating
Defrosting operation
65Hz
65Hz
95Hz
Designated Hz
1'45" 1'45"
00
ON
Solenoid valve
(SV
L,SVS)
4-way valve
(20SL,SS)
Output of heating
(c)
When any of the following conditions is met, the defrosting finishing operation will start.
1) When the temperature of the heat exchanger sensor (Th
O-
R) increases adove 20°C
2) When 12 minutes has passed after start of defrosting.
Conditions for finishing Defrosting