Trane TUHMB080ACV3VA User Manual

46 UHM-DHM-SF-1H
Service Facts
Scroll through
User Interface to
View number 1 of
Last 4 Faults
DEFINITION:
GND ERR - Incoming or chassis
ground connection is not sensed
POLARITY ERR – Incoming high
voltage wiring is reversed
User Interface
shows a GND
FAULT or
POLARITY ERR?
Connect volt meter
to white incoming
neutral wire and
green earth ground
Does meter
read ~120 vac?
Disconnect
incoming electrical
power to furnace
YES
Reverse 120 vac
power leads to
furnace wiring
Reconnect power
Check operation
Connect volt meter
to black incoming
and chassis ground
at burner box
NO
Does meter
read ~120 vac?
Disconnect
incoming electrical
power to furnace
NO
Correct earth
ground.
Check operation
Check / correct all
ground
connections within
furnace for
continuity
Disconnect
incoming electrical
power to furnace
YES
Check operation
Is there a
voltage greater
than 10 VAC
NO
Correct neutral
and ground
problem. Furnace
must be on a
dedicated circuit.
YES
NO
See next page for
additional 6 flash
faults
6 Flash Fault LED

Trane TUHMB080ACV3VA Specifications

General

Brand	Trane
Model	TUHMB080ACV3VA
Category	Furnace
Language	English