Carrier 38TDB Anleitung zur Fehlerbehebung PDF herunterladen (Seite 21)

Software Revs 3,5,6,8,10, 12 Infinity /Evolution Troubleshooting (Rev. 2)

10-12-2006

Troubleshooting Communication Bus

Connect UI to indoor

unit at the indoor unit.

CAN NOT FIND INDOOR UNIT

Disconnect O.D. unit

and all other devices

on ABCD bus except

indoor unit and UI.

Cycle system power.

Indoor

unit

Indoor

unit

Try

another

Measure voltage on ABC

terminals at indoor unit (see

Table-1) Possible indoor unit

problem.

Check wiring to UI

mounting location.

YES

Reconnect one

device at a time to

ABCD bus.

YES

Device

found?

Check device

wiring.

Wiring

OK?

Correct

wiring and

reinstall

system.

Measure

voltage on

ABC

terminals at

device (see

Table- 1)

Possible

device

problem.

YES

1 2 ... 16 17 18 19 20 21 22

10/12/2006 1
Troubleshooting 5
Original 10
-A models 10
10-12-2006 21

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