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6. Procedures for Disconnecting Valve Cable and Heater Cable Connectors
When the valve and heater cable connectors are fitted, they are secured inside by the claws
at the end of the connectors. Therefore, once they are connected, they cannot be
disconnected by pulling.
Disconnect the connectors in accordance with the following procedures.
1) Make sure that power is not on the Liquid flow meter(LF or XF) and heaters.
2) Slide up the knurled portion of each connector in the drawing direction straightly.
3) Disconnect the connector with the knurled portion up.
* While MV is at the set temperature, also the connectors are hot. Before disconnecting the
connectors, turn off the temperature regulators of MV. Disconnect them after the main
unit cools off.
7. Troubleshooting
When any trouble occurs with MV flow control or temperature condition, check the following
points.
The temperature of MV does not stabilize.
Cause Countermeasure
The PID constants of the temperature
regulators are improper.
Perform the auto tuning of the temperature regulators under the
working conditions (supply voltage, temperature, etc.).
The heater power supply shorted out.
Once turn off power, and check the heater power line.
Thermocouple contact failure
Check the connection of the thermocouples to the temperature
regulators and MV.
The control cycle of the temperature
regulators is long.
Use temperature regulators having a control period of 1 second
or less.
If the control cycle can be set, change the setting to 1 second or
less.
Knurled portion
