– 12 –
★
1
58.0Hz
58.0Hz
★
2
74.0Hz
80.0Hz
S 1731
S 1735
Compressor
Outdoor fan
4way valve
ON
OFF
OFF
ON
ON
ON
ON
48.0Hz
2min.
1min.
50sec.
50sec.
53sec.
Max 12min.
53sec.
sec.
10
2min.
-1˚C
8˚C
Defrosting starts
Defrosting stop
Temperature of
outdoor heat exchanger
★
1
★
2
DEFROSTING OPERATION(FOR OUTDOOR UNIT HEAT EXCHANGER)
•
Defrosting operation is controlled by the temperature of outdoor heat exchanger sensed by the thermistor and
the timer switch.
•
Defrosting operation starts when the both of the following conditions are met at the same time.
a) 34 minutes’ of continuous run of the compressor after the start of heating operation or after the completion
of previous defrosting operation.
b) the temperature of the outdoor heat exchanger stays lower than -1
°
C continuously for two minutes.
•
Defrosting operating is called off if either of the following conditions is met.
a) The temperature of outdoor heat exchanger rises to 8
°
C while 4-way-valve is ON.
b) 12 minutes has passed since compressor turned OFF.
OPERATION DETAILS
Model
Summary of Contents for S1731
Page 24: ... 23 ELECTRIC CIRCUIT DIAGRAM S1731Outdoor S1735Outdoor ...
Page 31: ... 30 PCB AC 377 AC 379 SCHEMATIC DIAGRAM AND PCB S S1731Outdoor S1735Outdoor Bottom View ...
Page 32: ... 31 FILTER PCB AC 378 SCHEMATIC DIAGRAM AND PCB S S1731Outdoor S1735Outdoor Bottom View ...
Page 34: ... 33 SCHEMATIC DIAGRAM AC 377 AC 379 SCHEMATIC DIAGRAM AND PCB S S1731Outdoor S1735Outdoor ...
Page 35: ... 34 FILTER PCB AC 378 SCHEMATIC DIAGRAM AND PCB S S1731Outdoor S1735Outdoor ...
