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In the Event of Failure…
Trouble Shooting
When a trouble occurs
Condition
Check the following
Water is not supplied.
Defect of raw water supply solenoid valve.
Insufficient city water pressure or water failure.
Defect of pressure switch.
Clogging of pre-treatment cartridge.
Water supply does not
stop.
Defect of float switch.
Defect of raw water supply solenoid valve.
No water is supplied to
boiler.
Defect of boiler water supply solenoid valve.
Defect of float switch.
Clogging of pre-treatment cartridge.
Opened boiler water drain cock.
Heater does not turn on.
Defect of float switch.
Break in heater.
Cooling water does not
flow.
Defect of cooling water solenoid valve.
The initial accumulated
water is not drained.
Initial boiled water is not drained.
Distilled water is not
accumulated.
Defect of initial boiled water drain solenoid valve.
Defect of piping.
Distilled water is not
stored.
Defect of float switch.
Water is not sampled.
Defect of Ion exchanged water/Distilled water sampling solenoid valve.
Defect of distilled water sampling pipe.
Defect of piping.
Measures in emergency
Error indications/causes
This unit has a self-diagnosis function. When a trouble occurs during operation, or when a failure
occurs on the unit, an error message is displayed on the control panel. Turn off the earth leakage
breaker when an alarm occurs, close the tap.
For details of error indications, refer to "Failure indication and Its Contents (pages 52 and 55)".
Measures
When the following error signs appear, memorize the sign and turn the tap off immediately. If an
error occurs, part change or unit check becomes required. Please call the shop from which you
made a purchase or our customer support center. In that case, please notify them of the error sign.