Replacement Procedure; Troubleshooting - Siemens Maxum II Reference Manual

Electronic Compartment Component Descriptions and Maintenance Procedures
2.2 Power Entry and Control Module
2.2.4

Replacement Procedure

General Precautions
The PECM is the entry point for the line voltage for the entire analyzer.
Note
Specific additional instructions are provided with tags placed on the Maxum II and in the custom
application drawing package noted below. Installation must include all of the items noted in
both of these as well as the manuals. The tagging and custom application drawing package
are unique to the particular Maxum II.
● This procedure must be performed by a user who has detailed knowledge of the Maxum.
If a customer does not have the knowledge required for this procedure, then it is
recommended that Siemens Field Service personnel be contracted to assist.
● A tool kit including both standard and metric wrenches, Hex wrenches, and nut drivers is
required to perform this procedure.
● Before beginning replacement, be sure to save a current database of the application to be
reloaded after the PECM is replaced in case this becomes necessary.
Voltage dangerous to life is present on the PECM. Failure to observe proper safety measures
can cause severe injury or death.
Before beginning to remove or install the PECM assembly, the power must be externally
removed from the GC. AC power comes directly into this board for regulation and distribution
in the electronics enclosure, so power must be removed and secured/tagged to prevent
inadvertent application while this procedure is being performed.
2.2.4.1

Troubleshooting

PECM Status LEDs
The PECM3 should start automatically once power is applied. If the unit is not operational after
applying power, then review the information below to aid in correcting the problem.
The most common issue with replacing the PECM3 is cables, wiring connections, and jumpers.
Check all of the cable connections to ensure that they are seated and connected properly.
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Maxum II Reference Manual
Manual, 7/2017, 2000596-001