– 37 –
SIM Inverter Monobloc Air-to-Water Heat Pump
Parameter D (Defrost Parameter)
1. Requirements to enter defrosting
① Check the suction pressure for 1 min. after the compressor starts, and when suction pressure is ≤D05, defrosting timing shall
be started.
② If the suction pressure sensor failure, the unit will start timing defrost, and the defrost cycle is D03, defrost time is D04.
2. Requirements to stop defrosting
① After starting defrosting, when T09≥D02,and T06≥D01, the unit stops defrosting;
② If the defrosting time reaches the maximum D04, the heat pump stops defrosting. D01——Exit Defrosting Setpoint.
3. Defrosting action
① The following operations shall be conducted if it complies with enter defrosting requirements:
a. The compressor start to down the frequency at the target frequency of 30Hz.(timings start).
b. When the cumulative time is 55S, the fan stops working and the four-way valve turns its direction.
c. Continue to accumulate 5s, and then start to up the frequency, and the target frequency is the max.value of D11.
② The following operations shall be conducted if it complies with stop defrosting requirements:
a. The compressor start to down the frequency at the target frequency of 30Hz (timings start).
b. The fan stops working, when the cumulative time is 55S, the four-way valve turns its direction.
c. Continue to accumulate 5s, and then start to up the frequency;
d. Raise the frequency to the start frequency setting and maintain it for 3 minutes before automatically determining the inlet
temperature.
Abnormal end of defrosting
① If the system turns off at the period of defrosting, it will keep on defrosting until defrosting ends.
② When detecting the HP switch is disconnected in the course of defrosting, the heat pump will stop defrosting.
③ When detecting the water ow switch is disconnected in the course of defrosting, the heat pump will stop for protection.
④ When detecting the LP switch is disconnected in the course of defrosting, the heat pump shield this fault and keep defrosting.
⑤ When detecting the exhaust temperature is overheated in the course of defrosting, the heat pump will stop for protection.
⑥ When detecting anti-freezing protection in the course of defrosting, the heat pump will stop for protection.
To Next Page
Loading...
Need help?
General
