Sunrain YC-007TB1, Руководство по установке и эксплуатации, Страница: 23 / 32

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When the controller is in the normal display state, press and hold the “ ” button for 3 seconds to
start or turn off the timed water return function; the “ ” icon lights up when it is turned on, and the “ ”
icon turns off when it is turned off.
The timing return control is as follows:
A, no return water temperature sensor
When the timing water returned function is activated and the timed start time is reached, the water pump
is started. After 30 seconds, the water pump is turned off, and the buzzer sounds three times, prompting
the user to use the hot water; After 15 minutes, the water pump is started again and the cycle is
repeated. .
If press and hold the "cold hot" button for 1 second or the timed return water close time is reached in this
process, the timed water return function will be turned off (the return water function is still valid for next
time, unless the timed return function is turned off).
B, there is a return water temperature sensor
When the timing return water starts, and the start time reaches, if the return water pipe temperature <
return water set temperature, and the current water tank temperature ≥ return water set tempe
return water temperature difference, the return water pump will start. If backwater pipe temperature ≥
return water set tempe return water temperature difference for 5 seconds or temperature control
return water time ≥ 2 minutes, the water pump will turn off. The buzzer sounds three times, prompting the
user to use hot water; When the pipe temperature < return water set temperature, the water return pump
is started again and the cycle is repeated.
If press and hold the "cold hot" button for 1 second or the timed return water close time is reached in this
process, the timed return function will be turned off (the return water function is still valid for next time,
unless the timed return function is turned off).
Note: When the return water temperature is faulty, it will automatically switch to the “no return water
temperature sensor” mode.
3.5 Anti-fouling function
Sometimes the return pump/circulation pump stops for a long time, the pump will be rusted or scaled, and
the pump needs to be started periodically.
After the pump has been on standby for 12 hours, it is forced to run for 1 minute.
4. The Alarm
4.1 Low pressure fault:
After the compressor running for 5 minutes, if the low-pressure switch is detected to be in the off state for
10 consecutive seconds, the compressor immediately stops running. At this time, the controller displays
the low-pressure fault alarm code “04E”. If the low-pressure switch is restored, error code does not occur.
If no other protection or locking occurs, the compressor is restarted after 3 minutes.
If low-pressure fault protection appears 3 times within 1 hour, the controller will lock the protection. And
the compressor will lock in the shutdown protection state. At this time, only the shutdown and restarting
can unlock the compressor. The low-pressure switch is not detected during the defrosting.
4.2 High pressure failure:
After the compressor is started, if the high-pressure switch is detected to be in the off state for 10 seconds,
the compressor immediately stops running. At this time, the controller displays the high-pressure fault
alarm code “03E”. If the high-pressure switch is restored, error code will not occur. And if no other
protection or locking occurs, the compressor is restarted after 3 minutes.
If high-pressure fault protection appears 3 times within 1 hour, the controller will lock the protection, and