Chapter Five: Maintenance and Troubleshooting General Information
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Chapter Five: Maintenance and Troubleshooting
General Information
If the 247 controller fails to operate properly upon receipt, check for shipping damage, and check
the cables for proper continuity. Any damage should be reported to the carrier and MKS
Instruments immediately. If it is necessary to return the unit to MKS, obtain an ERA number
(Equipment Return Authorization Number) from a MKS Service Center before shipping. Please
refer to the inside back cover of this manual for a list of MKS Calibration and Service Centers.
Maintenance
Periodically check for wear on the cables and inspect the enclosure for visible signs of damage.
How To Clean the Unit
Periodically wipe down the unit with a damp cloth.
How To Replace the Fuses
The line fuses protect the internal circuitry; both sides of the line are fused.
Caution
Disconnect the power cord from the 247 unit
before
you replace the
fuse, to avoid any damage.
1. Select the proper fuses. Refer to Table 6, page 30, for the fuse values.
2. Disconnect the power cord from the 247 instrument.
Warning
To avoid an electrical shock, be sure to disconnect the
power cord
before
proceeding.
3. Disconnect all cables from the connectors located at the back of the unit.
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