PG LifeLink MARK V - Page 17

PG LIFELINK Mark V Line Isolation Monitor Instruction Manual Rev. 2.0
© 2014 PG LifeLink, Inc. - All rights reserved Page 17
enclosure. This can happen only when screws are tightened, so carefully
check the alignment of the parts to the box.
 Shorts from remote parts or wiring to earth ground will affect LIM operation.
The problems below may indicate an internal failure of the LIM. If the LIM requires
service, it must returned to the factory. Contact PG LifeLink Technical Support or
Sales for a Returned Materials Authorization. No returns will be accepted without a
RMA. Normal replacement procedure is to require a valid form of payment before
shipment, then credit will be issued after the returned unit has been received at
the factory and inspected.
LIM displays do not illuminate
 Verify that the correct line voltage is applied at pins 14 & 15 of the LIM
connector. Disconnect all wiring from the remote annunciator terminal board.
If the correct line voltage is present and all external equipment is
disconnected from the LIM but it still does not function, the LIM must be
returned for service.
LIM displays “
Gn” (Ground loss)
 One of the two ground wires, at pins 12 & 13 of the connector, is
disconnected. Check all wiring carefully. If it appears intact, verify its integrity
by measuring the resistance from pin 12 to pin 13 of the connector with it
disconnected from the LIM after verifying that power to the equipment is
turned off. It should be very low, well below 1 ohm.
 A wire to a remote annunciator is shorted to earth ground. Disconnect all
wiring from the remote annunciator terminal board; if the problem clears,
check the wiring at each remote rst, looking for nicked insulation, bare
wires, part of the remote touching its mounting box, etc.; If the problem is
not cleared, check all wires for a short to ground using an ohmmeter.
 If the problem is not caused by faulty wiring, the LIM’s ground loss detection
circuit has failed. One possible cause is damage from prior improper
connection (not covered under warranty).
LIM displays “NO LIM COMMUNICATION”
 The LIM CPU Board contains the rmware for operation both as a LIM and as
a DRA-VS remote. It makes the determination of which it is by the presence of
power line sync signals from the Power Supply Board. This error indicates that
the CPU is not receiving power line sync. It can be caused by an internal
failure; a common external cause is shorted remote wiring. Check the wiring
as described in the above section covering the LIM displaying “
Gn” before
returning the LIM for service.
 On a DRA-VS, this indicates a loss of data reception from the LIM. Check the
RS-485 data wires, including verifying that they are not reversed.
LIM displays “
Er” (Error) and/or one of the “System Error” Messages
 The LIM has detected an internal malfunction. Contact the factory for service.
 System Errors are very rare. If any of them occurs and cannot be cleared by
power-cycling the unit, it must be returned to the factory for service.
However, if one does occur, please make a note of the circumstances under