TROUBLE-SHOOTING / DIAGNOSTIC CHART
NORMAL MAINTENACE
Note: Do not attempt to repair this water heater yourself. Call a technician for assistance. The
power supply always needs to be shut off when these operations are carried out.
Regular maintenance is not required. However, to ensure consistent water flow, it is
recommended to follow these instructions:
1. Periodically remove scales and dirt that may build up at the aerator of the faucet or in the
shower head.
2. There is a built-in filter screen at the inlet connection which should be cleaned from time to
time. Please turn off the water flow before doing this.
* 7 and 8 should only be performed by a qualified electrician. The person who initially
installs the unit is the best one to contact for help.
A. Tighten fittings.
B. Change rubber washer.
A. Connect power to the unit.
B. Change LCD.
C. Connect LCD to the PCB Board
.
A. Open valve to get water.
B. Open valve to get pressure.
C. Change key or PCB.
A. Set a lower temperature.
B. Open valve bigger.
A. Set a higher temperature.
B. Reduce water flow.
Clean strainer and shower.
A. Reduce the temperature.
B. Turn up the water flow.
Please contact with the local dealer.
A. Fittings not tight
B. Rubber washer worn-out
A. Power not connected.
B. LCD damaged.
C. LCD not connected to PCB.
A. No water out from shower.
B. Water pressure too low.
C. Key or PCB damaged.
A. Too high temperature set.
B. Water flow too small.
A. Low temperature set.
B. Water flow too much.
Inlet strainer or shower clogged.
A. Outlet temperature is over
6O°C/14O° F.
Temperature sensor failure.
1. Inlet and outlet
fittings leaking
2. LED no signal
3. Functional keys not
working
4. Water too hot
5. Water too cold
6. Outlet gets water
smaller and smaller.
7. LED displays E1
8. LED displays E3
PROBLEM
POSSIBLE CAUSES CORRECTIVE ACTIONS
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