TROUBLESHOOTING
SYMPTOM “A”: NO HEAT - INDICATOR LIGHT OFF
1) ELECTRIC SUPPLY IS OFF
Turn on the main circuit breaker.
2) NO OR LOW WATER FLOW
Ensure that the minimum flow rate to switch on your heater is met.
T, TC Models – 0.75gpm
T2 Models – 1.5gpm
P2 Models – 1.5gpm
Also check that the inlet filter screen is clear from any
debris. This is located in the brass inlet boss.
3) WATER CONNECTIONS ARE REVERSED
Cold water inlet = right side, hot water outlet = left side.
4) ELEMENT BURNED OUT
TURN OFF THE MAIN CIRCUIT BREAKER!
Using an ohmmeter test the resistance of the heating element
across the two threaded termination rods on top of the element.
The resistance reading should be under 10 ohms. If the resistance
is much greater than this value, call Waiwela for a replacement element.
5) ECO TRIPPED (High Limit Thermostat)
TURN OFF THE MAIN CIRCUIT BREAKER!
Reset by pushing in red button on each heater module.
SYMPTOM “B”: NO HEAT OR LOW TEMPERATURE WITH INDICATOR LIGHT ON
1) WATER FLOW TOO HIGH
Reduce the water flow by using an outlet ball valve. See page 8 for temperature rise at various
flow rates.
2) INCORRECT POWER SUPPLY
Make sure that the unit is connected to the voltage supply specified on the rating label on the
front cover of the unit and no other.
3) ELEMENT BURNED OUT
TURN OFF THE MAIN CIRCUIT BREAKER!
Repeat the steps from paragraph 4 above.
4)THERMOSTAT ADJUSTMENT SCREW NOT TURNED UP (Models “T”, “TC” and “T2” only.)
Turn both thermostat adjustment screws clockwise in small increments until the indicator light(s)
remains on. Take care not to force the screw past it’s stop position.
5) ECO TRIPPED (High Limit Thermostat)
See Paragraph 5 above.
9
