Trane UHMB060ACV3VA Series Service Facts page 34

Service Facts
Alert Codes
Fault LED
sorted by furnace
Flash Codes
Alert codes are taken
from the Alert Code
Addendum and are
organized by the furnace
flash codes for easier
reference.
34
S O 9
Alert Notification
COM LED User Interface Display
RECYCLE
RETRY
2 Flash Device count
RECYCLE LO
RETRY LO
PS3 OPEN
PS3 CLOSED
PS2 OPEN
3 Flash Device count
PS2 CLOSED
PS1 OPEN
PS1 CLOSED
AUX LIMIT
4 Flash Device count
HIGH LIMIT
ROLLOUT OPEN
5 Flash Device count FLAME ERROR
POLARITY ERR
GND FAULT
6 Flash Device count
IGNITER ERR
TRIAC ERR
7 Flash EXT GV ERR
Device count
Solid ON INT GV ERR
8 Flash Device count LO FLAME SNS
9 Flash Device count IND LIMIT
SYS COMM CRC
Device count IND COMM CRC
BLW COMM CRC
10 Flash BLW COMM ERR
Device count
IND COMM ERR
SYS COMM ERR
Fast Flash
NO SYS CLK
Device count 24V COMM MSMTCH
Solid ON Device count CNTRL FAULT
None Device count TWIN ERROR
PM DATA ERR
CAP MISMATCH
ID MTR ERR
None Device count
PM MISSING
PM UNIT ERR
PM MEM ERROR
AC VOLTS LOW
None Device count
AC VOLTS HI
None Device count CHECK FUSE
Y1 OFF ERR
None Device count
Y1 ON ERR
TS 1 SHORT
TS 1 OPEN
None Device count
TS 2 SHORT
TS 2 OPEN
¹ Comfort Control will switch system to "OFF" until this fault condition clears
Notes:
D342960P01
C 9 08 00
Alert
Code
Control Display
N/A 20
ERR 22 22
N/A 1
ERR 26 26
ERR 87 87
ERR 34 34
N/A 33
N/A 88
ERR 10 10
ERR 93 93
N/A 4
ERR 26 26
N/A 90
ERR 91 91
ERR 139 139
ERR 18 18
19
N/A
N/A
ERR 114 114
N/A
ERR 114
59
N/A
N/A 92
101
ERR 101
N/A 119
PRINTED FROM: D802247P01 Rev 9
From drawing D802247P01
009 6
Alert Group Alert Description
Flame is off when flame should be
detected. Furnace tries to relight
Flame lost or Ignition
failure
Furnace tries to light, but no flame is
detected.
10 recycles within a single call for
Soft lockout due to
heat will cause 1hr lockout.
flame lost or ignition
3 ignition attempts in a row within a
retries
single call for heat results in 1 hr
lockout.
Open Pressure Switch, third stage
Shorted Pressure Switch, third stage
Open Pressure Switch, second stage
Pressure Switch
Failure
Shorted Pressure Switch, second
Open Pressure Switch, first stage
Shorted Pressure Switch, first stage
Open Reverse Flow - Heat exchanger
temperature too high. Could be
caused by low airflow or fan failure.
High Temp Limit Fault
Open High Limit - Heat exchanger
temperature too high. Could be
caused by low airflow or fan failure.
Roll Out Fault Open flame rollout
Flame detected, should not be
Flame Detect Fault
present
Line Polarity Fault Voltage reverse polarity
Occurs when proper earth ground is
Ground Fault
not detected.
Igniter fault
Ignition Means Fault
Triac fault
Control senses 24V present at the gas
valve when it should not be present.
Control tried to turn on gas valve, but
Gas Valve Fault 24V not sensed.
Control senses 24V present at the gas
valve when it should not be present.
Flame current is low, but still strong
Low Flame Signal
enough to allow operation.
Flue gas temperature too high. Could
High Temp Limit Fault
be caused by low airflow or fan failure.
COMM system unrecognized
response
Communication Busy
Inducer Motor unrecognized response
Fault
Blower motor unrecognized response
Blower motor no COMM response ¹
Inducer motor no COMM response
Communication Fault
Loss of heat/cool demand
Loss of clock signal
Communication Message has been
Communication
detected while configured for 24V
Failure
Control Failure Internal control failure
Twinning Not Allowed with Variable
Twinning Fault
Speed
Data Section is Corrupt but PM is
useable
Compressor size does not match
capacity in PM
Blower HP/OEM does not match PM
Bad or Missing PM
No PM
Primary Copy of Unit Data File is
Corrupt.
Primary and Secondary copies of Unit
Data File are Corrupt
Voltage too low
AC Line Fault
Voltage too high
Fuse 24V Fuse Open
Y1 Output OFF when it should be ON
Y1 Relay Failure
Y1 Output ON when it should be OFF
Temperature sensor 1 shorted.
Temperature Sensor
Temperature sensor 1 open.
Failure Temperature sensor 2 shorted.
Temperature sensor 2 open.
UHM-DHM-SF-1H
itself.
stage
Mode
Data