'21 • SRK-T-299
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141
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(r) Refrigeration cycle system protection
(i) Starting conditions
1)
2)
When 5 minutes have elapsed after the compressor ON or the completion of the defrost control
Other than the defrost control
(ii) Contents of control
1)
(iii) Reset condition
When the compressor has been turned OFF
2)
When the conditions of (i) above are satified, the compressor stops
Error stop occurs when the compressor has stopped 3 times within 60 minutes.
3)
When, after satisfying the conditions of 1) and 2) above, the compressor speed, room temperature (Th1) and indoor
heat exchanger temperature (Th2) have satisfied the conditions in the following table for 5 minutes:
Note (1) Except that the fan speed is Hi in heating operation.
Compressor speed (N)Operation mode
Cooling
Heating
(1)
Room temperature (Th1)
Th1−4<Th2
Room temperature (Th1)/
Indoor heat exchanger temperature (Th2)
Th2<Th1+6
50 N
<
=
10 Th1 40
<
=
<
=
0 Th1 40
<
=
<
=
50 N
<
=
(s) Refrigeration cycle system protection
(24) Defrost heater control
(a) Starting conditions
When all of the following conditions (i) – (iv) have been met for 1 minute continuously, with the compressor frequency at 0
rps or higher:
(i)
Operation is in the heating mode.
(ii)
Outdoor heat exchanger sensor(TH2) temperature is lower than
-
2.0°C.
(iii)
Outdoor air temperature sensor(TH3) temperature is lower than 0°C.
(iv)
1)
Outdoor air temperature, at 0°C
Difference between the outdoor air temperature and the outdoor heat exchanger sensor temperature is larger than 4°C.
2)
Outdoor air temperature, higher than
-
5°C and lower than 0°C
Difference between the outdoor air temperature and the outdoor heat exchanger sensor temperature is larger than 2°C.
3)
Outdoor air temperature, higher than
-
10°C and lower than
-
5°C
Difference between the outdoor air temperature and the outdoor heat exchanger sensor temperature is larger than 0°C.
4)
Outdoor air temperature, higher than
-
15°C and lower than
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10°C
Difference between the outdoor air temperature and the outdoor heat exchanger sensor temperature is larger than
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5°C.
5)
Outdoor air temperature, lower than
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15°C
Difference between the outdoor air temperature and the outdoor heat exchanger sensor temperature is larger than
-
5°C.
(b) Releasing conditions
When either of the following conditions is satisfied
(i)
Compressor frequency becomes 0 rps.
(ii)
When even one of the starting conditions of (a) is lost (When continuing for 1 minute)
Note (1) The heater is forced to turn off during defrost operation. When the defrost operation is over and the outdoor fan is turned on, the heater is forced
to turn on for 5 minutes. If the outdoor fan is turned off, the heater is also turned off.
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