Carrier GRAVINER Mk 7 - Fault Diagnostics and Remedies

March 2021 Page 98 of 143 59812-K007 Rev 17
Business Confidential
A list of the fault that are not listed in the Event Log are detailed below.
Fault
Description
Remote Display time and
date incorrect
When setting the date and time via the Remote Display Unit the
displayed date and time are incorrect.
The Remote Display Unit uses a Lithium battery to maintain the
internal real time clock, when the battery reaches its end of life the
time and date are no longer maintained.
Control Unit time and date
incorrect
When examining the Event Log the time and date of events is
incorrect.
The Control Unit uses a Lithium battery to maintain the internal real
time clock, when the battery reaches its end of life the time and date
are no longer maintained.
Remote Display Unit not
communicating with the
Control Units
The engine bar graph is displayed with a cross rather than an oil mist
level.
The Remote Display Unit is unable to communicate with the Control
Unit.
Remote Display Unit
remains on the initial
screen.
On power up the Remote Display Unit only shows the Graviner splash
screen.
Remote Display Unit
displays a software
exception message
A software failure has caused an error to occur in the Remote Display
operating system resulting in an exception error.
5.2 FAULT DIAGNOSTICS AND REMEDIES
5.2.1 Backup Alarm Test Failure
A Backup Alarm Test is performed manually via the Test Menu, see section 3.5, or automatically during
the daily system check at 16:00hrs. If a failure occurs during the test a Backup Alarm Test fault is
indicated, see section 5.1.2
An inspection of the engine event log, see section 3.6, will list the event:
Backup Alarm Test Detector X Failed
5.2.1.1 Single Detector in fault
Having established which detector is in fault it is necessary to establish the cause of the fault using the
following steps.
1. Swap the detector with a known working detector.
2. Reset the Control Unit.
3. Perform a Backup Alarm Test via the Test Menu, see 2.11.3
If the fault indication remains at the original position return the swapped detectors to the initial
positions go to item 4
If the fault indication moves to the new position of the detector, the detector has failed and
should be replaced.
4. Swap the detector cable with a known working cable at the Control Unit.
5. Reset the Control Unit.
6. Perform a Backup Alarm Test via the Test Menu, see 2.11.3
If the fault indication remains at the original position return the swapped cables to the initial
positions go to item 7