Defrosting Mode; Conditions For Entering In The Defrosting Mode; Defrost Action - Tadiran Telecom TGI-07H Technical Manual

9. CONTROL MODE
Automatic
T T
setting- room
1ºC
2ºC
3ºC
4ºC
5ºC
≥6ºC

7. Defrosting mode

7.1 Frost is removed by reverse of the 4 way valve.

7.2 Conditions for entering in the defrosting mode :

After the unit gets started (in the heating mode) or every time the
defrosting run ends , calculated from the time when the heating run
continues for 12 min' , the drop in the coil temperature amount to at least "
6ºC " and the coil temperature reaches below 40ºC.
In the heating mode , the difference between the coil temperature and
indoor ambient temperature (inlet air temperature) is less than 10ºC , and
maintains for at least 5 min'
The coil temperature < 40ºC and maintaines for at least 90 min'
The airconditioner will enter defrosting as long as any of the three conditions is
satisfied .

Defrost action

Both the compressor and the outdoor fan motor are interrupted.
50 seconds later the 4 way valve turns off (cooling mode).
5 seconds later , the compressor get started.
Defrosting starts . the longest defrosting time is 13 minutes.
3 minutes after defrosting starts the value of the compressor current is read .
If the compressor current is above 1.2A higher than the current at the end of
the first 3 minutes , the system quites defrosting 1 minute later.
30 seconds later the , the 4 way valve returnes on.
5 seconds later compressor starts.
3 seconds later , outdoor fan motor starts.
Defrost ends.
F
an speed
Low
Medum
Medum
Medum
High
High
T T F
an speed
setting- room
1ºC Low
2ºC Low
3ºC Medum
4ºC Medum
5ºC Medum
≥6ºC Medum
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