STP-301/451 Series Instruction Manual
11-9
Troubleshooting
11.3 Maintenance and Inspection
◇ When performing maintenance and inspections of the STP pump, exhaust gases
inside the STP pump thoroughly.
Residual gases may cause an accident when removing the STP pump.
Confirm the characteristics of gas to be used, referring to the Material Safety Data
Sheet (MSDS) you obtain from the gas supplier.
Wear personal protective equipment if necessary.
◇ Stop the STP pump, and turn OFF the primary power (switch the breaker "OFF"),
before performing maintenance of the STP control unit (such as fuse replacement).
Failure to do so may result in an accident such as an electric shock.
◇ Stop the STP pump, and turn OFF the primary power (switch the breaker "OFF"),
before performing inspections of the STP pump (for deposit).
Failure to do so may result in the inadvertent rotation of the STP pump, which may
result in an accident.
◇ Do not touch any place other those specified when performing maintenance or
inspecting the pump and NEVER open any panel because it could cause shock,
malfunction, or short circuit.
◇ Power OFF the baking heater and the air cooling unit, before performing
maintenance or inspections.
◇ The wipes used for clean and decontamination might become hazardous waste
depending upon the solvent (alcohol). Dispose of the contaminated wipes
appropriately according to the regulations of each national and/or local government.
11.3.1 Inspecting the Air Cooling Fan
Turn ON the primary power (switch the breaker "ON").
Confirm that the air cooling fan at the STP control unit side panel (left) is operating.
If the air cooling fan is not operating, contact Service office to replace it.
It is recommended to inspect the air cooling fan once a year.
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