MKS 651D Series, User Manual, Page: 131 / 162

Chapter Seven: Maintenance and Troubleshooting General Information
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Chapter Seven: Maintenance and Troubleshooting
General Information
If the 651 controller fails to operate properly upon receipt, check for shipping damage, and
check the cables for 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.
Warning
All returns to MKS Instruments must be free of harmful,
corrosive, radioactive, or toxic materials.
Maintenance
Periodically check for wear on the cables and inspect the enclosure for visible signs of damage.
How to Replace the Fuses
The fuses are IEC rated (where the name plate value is the expected current carrying rating) and
not UL or CSA rated (where the name plate value is nearly the current blowing rating). Use of
UL or CSA rated fuses will cause unnecessary blowing at high loads.
Appropriate replacement fuses include:
•
Bussmann GDC-T315 mA or equivalent for the 0.315 A fuse
•
Bussmann GDC-T630 mA or equivalent for the 0.63 A fuse
•
Bussmann GDC-T1.25 A or equivalent for the 1.25 A fuse
To replace the fuses:
1. Identify and the proper fuses for the selected line voltage.
All units should have two fuses installed to fuse both sides of the line. Refer to Table 5,
for information on the line voltage and fuses.
2. Disconnect the power cord from the 651 controller.