Trouble shooting – Yokogawa Pneumatic Retractables RF20H User Manual

Page 17

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IM 12B06K05-E-E

17

7. Trouble shooting

Refer to the instructions and warnings in the specified chapters.

7.1 Holder does not move from the "service" position to the "measuring" position

possible reason

measure

no compressed air

check pneumatic tubes (chap. 6.4, 4.6)

pressure too low

pressure must be between 4 and 6 bar (chap. 4.6)

no sensor

Installing the sensor (chap. 4.7)

loose sensor

tighten sensor (chap. 4.7)

7.2 Holder does not move from the "measuring" position to the "service" position

possible reason

measure

no compressed air

check pneumatic tubes (chap. 6.4, 4.6)

pressure too low

Pressure must be between 4 and 6 bar (chap. 4.6)

Insertion rod or protection cage is blocked.

• Preparing the system (chap. 4.1)

• Holder remains in “measuring” position

• Removing the cleaning chamber with process

connection (chap. 6.5)

• Removing the insertion rod (chap. 6.7)

7.3 Incorrect position reply

possible reason

measure

pneumatic tubes are connected incorrectly

check pneumatic tubes (chap. 6.4, 4.6)

7.4 No position reply

possible reason

measure

no compressed air

check pneumatic tubes (chap. 6.4, 4.6)

pressure too low

pressure must be between 4 and 6 bar (chap. 4.6)

drive unit defect

Replacing the drive unit (chap. 6.10)

7.5 Frequent contamination of sensor

possible reason

measure

cleaning pipes incorrectly connected

check cleaning pipes (chap. 4.5)

cleaning liquid pressure too low

raise cleaning pressure.

cleaning chamber is blocked

pressure must be between 1 and 4 bar (chap. 4.6)

cleaning liquid not adequate

choose adequate cleaning liquid

cleaning period too short

extend cleaning period

cleaning interval too long

reduce cleaning interval

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