GREE AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
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During this period, the following operations can be performed:
1) Press ▲ or ▼ 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 ▲ or ▼ to select the number
of vacation days from 3 to 120 days and press the TIMER button to confirm setting. Then press ▲ or ▼ 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:
① 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.
② 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.
③ 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.
4.7 Special Function
4.7.1 Keypad Lock
In normal status of the unit, press and hold ▲+▼ for 5s. The LOCK icon is displayed on the controller
and all buttons become unavailable. The LOCK icon blinks when any button is pressed. To cancel the
Keypad lock function, press and hold ▲+▼ for 5s again. Then the LOCK icon disappears.
If the unit is faulty, the lock function becomes invalid and all buttons are available again. The Keypad
lock function will resume after the error is rectified. In addition, the lock status before power failure is
memorized.
4.7.2 Temperature unit setting (℃/℉)
In the Off state of the wired controller, press and hold MODE+▲ on the main interface for 5s to enter
the query interface. Then the query code 00 is displayed, press and hold MODE+▲ for 5s to display the
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