Defrost cycle
Start defrost | End defrost |
Timer reset
| Temperature end |
| defrost (d4) |
| Temperature start |
| defrost (d3) |
Minimum time |
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start defrost (d5) | Duration defrost |
Parameter | Description | Unit | Factory value | ||
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YLCC | |||||
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d1 (USER) | Activation defrost (0 = no; 1 = yes) |
| 1 | 1 | |
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d2 (USER) | Defrost by time/temp. (0 = time; 1 = temp.) |
| 1 | 1 | |
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d3 (USER) | Temperature start defrost | °C | |||
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d4 (USER) | Temperature end defrost | °C | 5 | 5 | |
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d5 (USER) | Minimum time for defrost start | sec. | 60 | 60 | |
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d6 (USER) | Minimum duration defrost | sec. | 0 | 0 | |
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d7 (USER) | Maximum duration defrost | min. | 10 | 10 | |
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d8 (USER) | Time between two defrost cycles | min. | 30 | 30 | |
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d9 (USER) | Delay between defrost of both circuits | min. | 10 | 10 | |
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db (USER) | Backup heater during defrost (0 = no; 1 = yes) |
| 0 | 0 | |
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dc (USER) | For compressor before defrost (between 1 and 3) (a) | min. | 0 | 0 | |
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dd (USER) | For compressor after defrost (between 1 and 3) (b) | min. | 0 | 0 | |
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(a)When defrost conditions are reached, and before starting the cycle, the compressor turns off during the dc interval (can be set to between 1 and 3 minutes). Once the com- pressor is off, the
If dc = 0, this procedure is deactivated.
(b)When the defrost cycle is over, the compressor turns off during the dd interval (can be set to between 1 and 3 minutes). Once the compressor is off, the
outdoor exchanger.During this process, the controller does not consider compressor programmed timings and, there- fore, the compressor goes on and off intermediately.
If dd = 0, this procedure is deactivated.
Pump operation
Three operating modes of the water pump can be selected in accordance with the value give to the H5 parameter.
Parameter H5 Pump operating mode
0Pump absent
(1)In permanent operation
2In operation under call from the controller (demand for cool or heat)
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