17
Trouble-shooting
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.
Problems
Possible Causes
Corrective Actions
1. Inlet and outlet fittings leaking
A.
Fittings not tight
B.
Rubber washer worn-out
A.
Tighten fittings.
B.
Change rubber washer.
2. LED no signal
A.
Power not connected.
B.
LCD damaged.
A.
Connect power to the unit.
B.
Change LCD.
3. Functional keys not working
A.
No water out from shower.
B.
Water pressure too low.
C.
Key or PCB damaged.
A.
Open valve to get water.
B.
Open valve to get pressure.
C.
Change key or PCB.
4. Water too hot
A.
Too high temperature set.
B.
Water flow too small.
A.
Set
a lower temperature.
B.
Open valve bigger.
5. Water too cold
A.
Low temperature set.
B.
Water flow too much.
A.
Set
a higher temperature.
B.
Reduce water flow.
6. Outlet gets water
smaller and
smaller.
Inlet strainer or shower clogged.
Clean strainer and shower.
7. LED displays E1
Outlet temp. is over 67
℃
/153
℉
A Reduce the temperature
B Turn up the water flow
8. LED displays E3
Temperature sensor failure
Please contact with your local dealer
9. Display overload
Inlet water flow is too high
Reduce the inlet water flow
10. LED Displays E4
Dry heating
Shut off. Clean all outlets of any debris,
dirt, any particle or scale inside the pipe.
11. Pressure relief valve
releases water
A. Outlet blocked
B. Inlet pressure over 0.7 Mpa - 102 psi
A. Clean shower set
B. Reduce water pressure
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.
