104 NPE Service Manual
Emergency measures for a blocked water adjustment valve * (refer to page 47 for Component Test
mode information)
1. Switch off power, shut off water supply to the unit, and drain water from the unit.
2. Remove the top/bottom clips of the water adjustment valve.
3. Disassemble the motor and open the lid.
4. Turn the water adjustment valve axis disk counterclockwise until it does not turn anymore.
5. Pull out the water adjustment valve power connector.
6. Reconnect power and start the unit while using hot water.
Turn the gear clockwise to open the valve
manually
Closed Position Open Position
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