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Power indicator
The top indicator shows that there is power to the unit.
Heater indicator
The middle indicator shows when the heater is heating. When the temperature is being set and the new set
temperature is higher than the temperature already in the unit, the heater indicator will light as the unit tries to
follow the set temperature. If the light is on continuously the heater is getting constant power. The only exception
is described under “Over-temperature indicator”. As the temperature approaches the set temperature the heater
indicator will flash. When the set temperature is reached the indicator will stay on for shorter periods. If the bath
temperature is above the set temperature then the indicator will be off, as the heater is not getting any power.
Over-temperature indicator
If the unit should, for any reason, exceed the temperature set for the over-temperature cut-out, the over-tempera-
ture indicator will light. The heater will have been switched off and the unit will begin to cool even if the heater light
is on (the light staying on or not depends on which circuit has sensed an over-temperature).
