Specifications

FDC-HKX
795
(d) Defrosting
(i) Conditions for starting defrosting
When all the following conditions are met, the defrosting operation will start:
1) The cumulative operating time of the compressor comes up to 48 minutes after completion of a defrosting operation, or it comes
up to 33 minutes after a heating operation starts (the remote controller is turned on).
2) Eight minutes has passed after the compressor was turned off and on.
3) Eight 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 thermistor (Th
O-R) has been below the
defrosting start temperature for three minutes in succession.
(ii) Operation of functional components in defrosting
(iii) Conditions for finishing Defrosting
When any of the following conditions is met, the defrosting finishing operation will start.
1) When the temperature of the heat exchanger thermistor (Th
O-R) increases adove 14˚C (R407C : 20°C)
2) When 12 minutes has passed after start of defrosting.
Outdoor air temperature (ThO-A)
Outdoor unit heat exchanger temp.
(Th
O-R
)
Defrosting start
Defrosting Finishing of defrosting, start of defrosting Finishing of defrosting Heating
Heating
Heating Output
(CnT-3)
Heating Defrosting operation Heating
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
65Hz
100Hz
20sec
Designated Hz
Frequency
CM2 OFF
CM2 ON
Outdoor unit fan
4-way
valve
SV1.2
Opener
or
Closed
On
or
OFF
Designated Hz
ON or OFF
ON or OFF
40Hz
10sec
35Hz
5sec Opener or Closed
Initiation temp. of defrosting (Cut off jumper wire J5)
R407C