Suzhou Lily Tech. Co., Ltd.
Page 3, Total 4 Pages
Control Function
Temperature Control
When T-water
≤ SP – U01, start heating.
When T-water
≥ SP, stop heating.
Heating start procedure:
Pump is on; 30 seconds later, outdoor fan is on, valve takes action; 30 seconds later, compressor is on.
Heating stop procedure:
Compress is off; 30 seconds later, outdoor fan is off, valve takes action; 30 seconds later, pump is off.
Note: the four-way valve works according to U34.
Aux Electrical Heater Control
When T-water
≤ SP – U01
If T-outdoor
≤ 10
℃
, electrical heater is on.
If T-outdoor
≥ 12
℃
, electrical heater is off.
When T-water
≥ SP, electrical heater is off
Note: Heater will be on during defrosting.
Water Ventilation Pump Control
The pump will be on 60 seconds before the compressor is on, be off 60 seconds after the compressor is off.
The pump will always be on during defrosting.
If there is no water flowing for 10 seconds, stop compressor and heater, and keep warning.
When the water flowing restores, restore the system control
Avoid Freezing in Winter (in Offline Standby State)
When T-outdoor
≤ 2
℃
, start anti-freezing pumping, the pump run 3 minutes for every 30 minutes.
When T-outdoor
≥ 3
℃
, stop this anti-freezing protection pumping.
Auto Defrost
Start auto defrosting: When compressor has been running for U30, and if T-pipe
≤ U31, start defrosting.
Compressor and outdoor fan stop; 55 seconds later, valve acts; 5 seconds later, start compressor.
Stop defrosting: When T-pip
≥ U32, or the compressor has been running for U33, stop defrosting.
Stop compressor; 55 seconds later, valve acts; 5 seconds later, start heating control.
Defrost after turning the system online: When turn online, if the T-pipe
≤ U31, defrost 1
st
.
Timer Defrost
If pipe sensor fails
，
and the compressor has been running for U30, and
If outdoor sensor is ok, and T-outdoor
≤ U31, start defrosting.
If outdoor sensor fails, start defrosting.
Exhaustion Over Temperature Protection
During compressor is on, if T-exhaustion
≥ U50, stop compressor.
When T-exhaustion
≤ U50-10
℃
, stop protection, and start heating control again.
High/Low Pressure Warning and Protection
When compressor running, if the high/low pressure is effective for 15 seconds, start pressure protection:
Stop compressor, until the high/low pressure is not effective.
If the pressure protection occurs 3 times within an hour, or once high/low pressure effectiveness keeps for
one hour, the controller will be in machine protection mode:
Never start heating again, until stop power supply and supply power again.
When compressor has just started, the high/low pressure is not check for 3 minutes.
Note: the high/low pressure mode is set in U51.
Compressor Delay Protection
After power supplied, the compressor can start after 3 minutes.
After compressor stops, it can re-start 3 minutes later.
Water Sensor Failure Warning
When this sensor fails, system stops heating.
