AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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During this period, the following operations can be performed:
1) Press to start or cancel the VACATION function. After this function is started, the
VACATION icon will be displayed without blinking and the water heater runs based on the preset
number of vacation days; If this function is canceled, the VACATION icon will not be displayed. If no
operation is performed within 5s, it will be regarded that this function is not required.
2) Press the TIMER button to set the number of vacation days. Press to select the
number of vacation days from 3 to 120 days and press the TIMER button to confirm setting. Then press
to start or cancel the VACATION function.
When the VACATION function is started under the On state, the water heater calculates the number
of vacation days accumulatively. And the STERILIZE function will be started to sterilize the water tank
one day before the vacation is over. In addition, hot water is prepared by advance in the HOTWATER
before the vacation is over.
Notes:
When time goes from 23:59 to 00:00, the system enters a new day, which is the basis for increasing
the number of days.
Every time after the VACATION function is started or the number of vacation days is adjusted in the
vacation function setting interface, the number of vacation days will be recalculated accumulatively.
Even when the VACATION function is being performed, operations such as vacation function
resetting and vacation day adjusting will also cause recalculation of the number of vacation days.
After the VACATION function is set, the water heater can still precisely calculate the number of
vacation days accumulatively in the case of short-term power failure. But ensure that there is no
long-term power failure; otherwise, the clock of the water heater will malfunction and the
VACATION function will not work properly.
4.6.6 CYCLE
The water pipe between the water tank and the water acquisition position is preheated duly when
hot water is available in the water tank. This enables immediate provision of hot water without requiring
exhausting of cold water in the water pipe, which is different from conventional water heaters. This
function requires installation of the water return system during unit installation. The water returning
system consists of the water return pump, water return pipe, check valve for the water return pipe, and
cycle temperature sensor for the water return pipe.
The CYCLE function enables both automatic and manual control. The later one is adopted by
default. For details on the setting method, see description on manual and automatic switchover of the
water return pump in section 6.8.3.
Manual control: After the water return system is installed and manual control is set on the wired
controller, press the FUNCTION button on the wired controlled before hot water is needed by the user.
The CYCLE icon blinks. Press and hold to keep the CYCLE icon on for 5s and then start the
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