Carrier GRAVINER Mk 7 - Page 137

March 2021 Page 126 of 143 59812-K007 Rev 17
Business Confidential
Remote Display Unit Spares
Item
Description
Part No.
Remote Display Unit
1-53836-K271
1.
24VDC Power Socket (no Cable)
1-27400-K304
2.
Modbus Connector (no Cable)
1-27400-K305
3.
Modbus Connector c/w 5m Cable
1-43682-K297
4.
24VDC Power Socket c/w 5m Cable
1-43682-K296
6.2.1 Remote Display Unit Replacement
The OMD Mk7 system can function independently of the Remote Display Unit allowing the Remote
Display Unit to be disconnected whilst the rest of the OMD system remains in operation. In this case the
Modbus connector should be removed BEFORE removing the 24V input to the Remote Display Unit.
The procedure to replace the battery is as follows: -
1. Remove the Remote Display Unit from its mounting position,
2. Disconnect the Modbus connector from the base of the unit.
3. Disconnect the 24V power connector from the base of the unit.
4. Replace the Remote Display Unit.
5. Connect the 24V power connector from the base of the unit.
6. Connect the Modbus connector from the base of the unit.
7. Fix the Remote Display Unit to its mounting position.
6.2.2 Communications Cable Replacement (Supplied by Others)
1. Switch off the system.
2. Disconnect the damaged communications cable from the Control Unit.
3. Disconnect the damaged communications cable from the Remote Display Unit or AMS.
4. Connect the replacement communications cable to the Control Unit ensuring it is screwed in place.
5. The replacement communications cable must be connected to the terminals in the Control Unit and
the Remote Display Unit or AMS.
6. Switch the system on and allow it to initialise.