STP-H803/H1303 Series Instruction Manual
11
Troubleshooting, Maintenance, and Inspection
The STP pump is provided with safety functions for various abnormality/errors.
When an abnormality/errors occurs in the pump or control unit, the safety
function operates with the "FAILURE" lamp lit, and an alarm signal is output
from the remote output pins. An error message showing the number of the error
in the form "Error n
°
**/**" and the contents of the error are displayed
alternately on the lower line of the LCD.
If an abnormality/error is found when using the STP pump, check it and take
measures in accordance with the following procedures.
If you cannot trace it or if the STP pump does not function normally after the
troubleshooting, fill in the necessary information in the "Malfunction
information" and fax it to Service office.
11.1
Troubleshooting Immediately after an Abnormality/Error Occurs
11.1.1
Troubleshooting Power Failure
Establish a sequence so that the power can be supplied to the STP control unit
immediately after a power recovery.
11.1.2
Troubleshooting Other Abnormality/Error
Troubleshooting
Refer to Section 7.4.6 and 7.5.5, "Starting the STP Pump after a Safety Function
Operates."
i. After confirming the "BRAKE" lamp goes out and the STP pump stops,
remove the probable cause of the abnormality.
When the LCD displays an error message, take the necessary action
according to Section 11.2, "When Error Message is Displayed on LCD."
ii. Perform the RESET operation according to turn off the "FAILURE" lamp.
iii. Perform the START operation. Check if the STP pump operates
correctly.
◇
When disconnecting cables from the STP pump and/or the STP
control unit to perform troubleshooting and take the necessary
action, confirm that the STP pump stops, turn OFF the primary power
(Switch the breaker "OFF"), then disconnect the cables.
◇
If the RESET operation does not turn off the "FAILURE" lamp,
confirm that the STP pump stops, turn OFF the primary power
(Switch the breaker "OFF"), then turn ON the primary power again
(Switch the breaker "ON").
11-1
