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Trouble-shooting
Problems
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
9 . Display overload
10. LED Displays E4
11. Pressure relief valve
releases water
7 and 8 should only be performed by a qualified electrician. The person who initially installed the unit is the best one to contact for help.
Normal Maintenance
Note: Do not attempt to repair this water heater yourself. Call a service person for assistance. Always turn off of
these operations the power supply needs to be shut off.
It is not required any regular maintenance. However, to ensure consistent water flow, it is recommended following
maintenance.
1. Periodically remove scale 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 inlet connection which should be cleaned from time to time. Please turn off the
water flow before doing this.
Possible Causes
A. Fittings not tight
B. Rubber washer worn-out
A. Power not connected.
B. LCD damaged.
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.
Outlet temp. is over 67℃/153℉
Temperature sensor failure
Inlet water flow is too high
Dry heating
A. Outlet blocked
B. Inlet pressure over 0.7 Mpa - 102 psi
17
Corrective Actions
A. Tighten fittings.
B. Change rubber washer.
A. Connect power to the unit.
B. Change LCD.
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 your local dealer
Reduce the inlet water flow
Shut off. Clean all outlets of any debris,
dirt, any particle or scale inside the pipe.
A. Clean shower set
B. Reduce water pressure
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