Elecro Engineering Nano SPA Heater Installation & Operating Manual page 9

Possible Cause 3:
➢ Heater is tripping circuit breaker (MCB) after few minutes/ hours of operation:
If the heater is faulty it will instantly trip circuit breaker (MCB). The most likely causes of tripping the
breaker after a period of time are:
Possible Cause 1:
Possible Cause 2:
Possible Cause 3:
Possible Cause 4:
Remedy:
➢ Heater is tripping circuit breaker (MCB) or RCD instantly:
Possible Cause 1:
Possible Cause 2:
Possible Cause 3:
Remedy:
➢ Power supply cable is getting very hot:
Possible Cause 1:
Possible Cause 2:
Remedy:
The 'Thermal safety cut-out' has tripped.
Remove button cover and press red button as far as possible to
re-set (see Fig. 6). If a positive click is felt, the cause of the tripping
must be investigated and could be caused by a debris build-up or air
pocket trapped inside the flow tube of the heater.
Faulty circuit breaker.
Incorrect size of the circuit breaker.
Cross section of the cable is not sufficient.
Loose connection(s) of the power supply cable. Check both ends of
the power supply cable (at the distribution box and at the heater
terminal block).
Contact an Electrician to check installation and protection.
Short circuit caused by the wiring or faulty components.
Heating element is going to ground or is damaged.
Moisture inside the heater.
Send the heater back to the manufacturer. Use the return form on
page 13 or download it from the Elecro website.
Cross section of the power supply cable is not sufficient.
Loose connection(s) of the power supply cable. Check both ends of
the power supply cable (at the distribution box and at the heater
terminal block).
Contact an Electrician to check installation. Inspect for loose
connections and upgrade the power supply cable to a bigger size if
necessary.
Fig. 6
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