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INM MTL SUM5 Rev 1
7
FAULT FINDING AND ROUTINE MAINTENANCE
7.1
Fault finding
When fault finding, carry out the following steps as far as is necessary.
• Check that, at least, one of the carrier power LEDs is ON.
• If a power LED is not on, first check the incoming supply is present and then check
the on-board 2.5A (T) fuse(s) and replace blown ones, after identifying the cause
of the fuse rupture. (Spare fuse kit FUS2.5ATE5 Pk 10)
• Check that all UI modules are displaying a green Status LED.
• A flashing LED indicates alarm or fault conditions - refer to section 8. Note: The
LED may also flash during intermediate stages of configuration.
• Exchange a potentially faulty UI module for a working unit
(see Section 5.2.2 for method).
Note that a replacement UI will automatically acquire the configuration from the
module base.
WARNING!
MTL4 range products MUST NOT be repaired. Faulty or damaged products
must be replaced with an equivalent certified product.
7.2
Routine maintenance
Check the general condition of the installation occasionally to make sure that no
deterioration has occurred. Carry out the following at least once every two years and
more frequently for particularly harsh environments.
a) Check the module LEDs to ensure that no ERROR conditions are being indicated..
b) Check to see that all UI modules do not appear to have been disturbed and appear
to be seated correctly in their module bases.
c) Check to see that any surge suppression modules fitted are correctly seated and
the tag strips are locked in place.
d) Check that modules and hazardous-area connections are correctly and legibly
tagged, and that the tag details given comply with the relevant documentation.
