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whether the CYCLE character is displayed is determined based on the scheduled time for water return.
6.7 Special Function
6.7.1 Keypad Lock
In normal status of the unit, press and hold
▲
+
▼
for 5 seconds. The LOCK icon is displayed on the con
-
troller and all buttons become unavailable. The LOCK icon blinks when any button is pressed. To cancel
the Keypad lock function, press and hold
▲
+
▼
for 5 seconds again. Then the LOCK icon disappears.
If the unit is faulty, the lock function becomes invalid and all buttons are available again. The Key
-
pad lock function will resume after the error is rectified. In addition, the lock status before power
failure is memorized.
6.7.2 Cleaning (available to circular models only)
In the Off state of a normal unit, press and hold MODE+
▲
for 5 seconds. The unit starts the clean
-
ing function and HOTWATER, SAVE, PRESET, and NIGHT icons are displayed on the LCD. To can
-
cel the cleaning function, press and hold MODE+
▲
for 5 seconds again.
The cleaning process lasts for 3 0 minutes at the most and it will stop automatically 30 minutes
after the cleaning function is started. When the cleaning function is started, the ON and OFF but
-
tons become unavailable. If the unit is faulty, the cleaning function is canceled automatically. This
function is used for cleaning circular air source water heaters and for exhausting air in the water
system during debugging.
6.7.3 Manual/Automatic switchover for the water return pump
In the Off state of the wired controller, press and hold MODE+
▲
on the main interface for 5 seconds
to enter the query interface. Then the query code 00 is displayed, press and hold MODE+
▲
for 5 sec
-
onds to display the configurable parameter codes and values. Press
▲
or
▼
to select P0 and press
the
MODE
button. Then item value 00 blinks under the parameter code P0. Press
▲
or
▼
to select
the item value and press the MODE button to confirm setting (00 indicates manual control and 01
indicates automatic control). After that, press the
FUNCTION
button to return to the main interface.
If no operation is performed with 15 seconds, it will switch back to the main interface automatically.
Note:
Other parameters cannot be modified; otherwise, operation exception will be caused.
6.7.4 Temperature unit setting (°C/°F)
In the Off state of the wired controller, press and hold MODE+
▲
on the main interface for 5 sec
-
onds to enter the query interface. Then the query code 00 is displayed, press and hold MODE+
▲
for 5 seconds to display the configurable parameter codes and values. Press
▲
or
▼
to select P5
and press the
MODE
button. Then item value 00 or 01 blinks under the parameter code P5. Press
▲
or
▼
to select the item value and press the
MODE
button to confirm setting (00: °C and 01:
°C). After that, press the
FUNCTION
button to return to the main interface. If no operation is
performed with 15 seconds, it will switch back to the main interface automatically.
