Precautions During Maintenance; Regular Inspection And Maintenance; Monthly Inspection And Maintenance - Hitachi TAW-270NH2A Operation Manual

MAINTENANCE

PRECAUTIONS DURING MAINTENANCE

CAUTION
!
O
Stop operation and turn the breaker off, before starting maintenance. Failure to heed this instruction may
result in electrical shock.
O
Do not expose the unit to water. Failure to follow this instruction may result in electrical shock.
O
Do not stand on an unstable mounting support during maintenance. Failure to follow this instruction may
result in personal injury if the support tips over.
O
Use gloves during maintenance. Otherwise, you may burn or otherwise injure yourself if you come into
contact with components or pipes inside the unit.
O
Drain the tank when the unit is not going to be used for an extended period of time. The quality of water will
change if it is left in the tank for one month or longer.
O
Fill the tank completely before turning on the power. The tank may overheat causing damage if the power
is turned on when there is no water in the tank.
O
Do not touch drain water or drain pipes during draining. The water is very hot and may cause burn
injuries.
O
Do not touch the combination faucet when the tank is being Ä lled. The faucet is very hot and may cause
burn injuries.
O
Do not touch the pressure-relief valve or drain pipes when inspecting the pressure-relief valve. The valve is
very hot and may cause burn injuries.

REGULAR INSPECTION AND MAINTENANCE

UNIT MAINTENANCE
Wipe the unit using a dry cloth or a cloth dampened with a solution of kitchen detergent and water.
NOTE:
Do not use benzine, thinner, scouring powder or the like, as they may damage the paint and plastic components.
Do not use 40°C or hotter water for cleaning as it may result in deformation of plastic parts.
WATER LEAKAGE INSPECTION
When the tank has been À lled, check if the leak water receiver is full or other parts leak water.

MONTHLY INSPECTION AND MAINTENANCE

OPERATION INSPECTION OF THE SAFETY PRESSURE-RELIEF VALVE
Operate the safety pressure relief valve and check water leaks from the drain pipe.
OPERATION INSPECTION OF CIRCUIT BREAKER
Operate the circuit breaker.
TIME CHECK
Check the time setting once a month and adjust as necessary.
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