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4.5 Operating Of The Unit
Leakage Testing
To Adjust Water Flow
Switch on the power supply, screen lights up and the digital peripheral strokes
turn. the unit will take self-inspection for 2s, “ELCB”; When the water flow
exceeds 1.5L/min, rotate the knob clockwise to switch on heating power rotate
switch, heating indicator light will be on, the unit start to work.
Rotate the handle of water flow adjusting valve to adjust the water flow.
Electricity Leakage Protection
When the electricity leakage testing circuit is working normally, if the leakage current is bigger than
certain value between 7.5mA and 15mA,the display will closed,no heating; it can only be used after
the failure is excluded. (When electricity leakage is tested, red and green indicator lights are all off,
stop heating and close the pump system.)
To Adjust Water Temperature
Rotate the handle of water flow adjusting valve to adjust to proper water flow. Adjust power by rotating
knob, clockwise rotate, power will be increased and water temperature increase accordingly or vice
versa.
NOTE
For first time using, ensure electrify after the unit is filled fully with water and there is
stable water flow comes out from shower head.
The electric water heater may be damaged if the water hardness is too high. To
guarantee the normal service life, please install and put it into use on condition that the
local water hardness is less than 450mg/L (CaCO3).
If the water flow is small and power is high while using the unit, outlet water temperature is rather
high; the unit will stop heating automatically. At this time, please lower the power and adjust the
water flow faster in order to avoid inconsistency of water temperature.
Use After Overheating Protection
When the unit is working under normal condition, press “PUMP”, The pump will start immediately and
while press again, the pump stops.
To Activate Pump Function (For MWH-38EU3-**)
When the water heater is working normally (including working state of PUMP),
press “TEST” button, if the leakage test circuit is no problem,the display will
closed, and the unit will not heat. Press “RESET”, testing will be canceled, and
the display will be on, the unit will be back to working state set before. If the
circuit leaks, press “RESET” button can’t cancel leakage testing,“the screen
does not light up, it means the water heater has problems and can’t be used; all the
buttons are invalid, heating stopped, and pump will be closed. If “Safety sign ”
twinkling flicker, is it means the heater cannot be connected to the Ground firmly.
Please check the Grounding before usage.
