Alliance Laundry Systems CA050L Operating instructions

www.comlaundry.com
Troubleshooting
Part No. 70422101
October 2009
Drying Tumblers
50 Pound Capacity
75 Pound Capacity
Starting Serial No. 0904004427
Refer to Page 7 for Model Numbers
TMB795C
TMB795C

© Copyright 2009, Alliance Laundry Systems LLC
All rights reserved. No part of the contents of this book may be reproduced or transmitted in any form or by any means without
the expressed written consent of the publisher.
70422101 1
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Table of
Contents
Section 1 – Safety Information .......................................................... 4
Locating an Authorized Service Person ............................................... 6
Safety Warnings and Decals................................................................. 6
Safety Precautions for Servicing Tumblers.......................................... 6
Section 2 – Introduction..................................................................... 7
Model Identification ............................................................................. 7
Serial Plate Location............................................................................. 9
Customer Service.................................................................................. 9
Wiring Diagram.................................................................................... 9
How a Tumbler Works ......................................................................... 10
Theory of Operation of Instant Electronic Ignition.............................. 10
Section 3 – Troubleshooting............................................................... 11
1. Motor Does Not Start............................................................... 12
2. Motor Overload Protector Cycles Repeatedly......................... 13
3. Motor Runs But Cylinder Does Not Turn................................ 14
4. Motor Does Not Stop............................................................... 15
5. Heating Element Does Not Heat or Burner
Does Not Ignite........................................................................ 16
6. Igniter Does Not Shut Off After Gas Ignition –
Gas Burner ............................................................................... 18
7. Heating Element or Burner Shuts Off Prematurely................. 19
8. Heating Element or Burner Repeatedly Cycles
Off On High Limit Thermostat................................................ 20
9. Heating Element or Burner Does Not Shut-Off....................... 21
10. Clothes Do Not Dry ................................................................. 22
11. Tumbler Overheating............................................................... 23
12. Burners Not Burning Properly — Gas Models........................ 24
13. Loading Door Opens During Operation................................... 25
14. Tumbler Runs But No Steam To Coils — Steam Models....... 26
15. Water In Steam Line — Steam Models................................... 27
16. Door Open Light and Display Flash With Door Closed ......... 28
17. Display Shows “SH” and Signals Sounds ............................... 29
18. Display Shows “OP” and Signal Sounds Three Minutes
After Tumbler is Started ......................................................... 30
19. Motor Runs, Time on Drying Timer But No Heat................... 31
20. No Main Burner Flame, Igniter Does Not Spark..................... 33
21. Steam OM Control: No Heat With Cycle Selected,
Unit Running and Calling For Heat......................................... 34
22. OM and RM Control: No Start With Cycle Selected,
Start Button Pressed and Door Closed..................................... 35
23. OM Control: No Display After Selecting One of the
ON/SELECT Keys................................................................... 37
24. Electric OM Control: No Heat With Cycle Selected,
Unit Running and Calling For Heat......................................... 38
25. Gas OM Control: No Heat With Cycle Selected,
Unit Running and Calling For Heat......................................... 40

270422101
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26. OM Control: No Fan Motor Rotation With Cycle
Selected and Start Pressed........................................................ 42
27. OM Reversing Control: No Cylinder Rotation or Reversing
Capabilities............................................................................... 44
Section 4 – Adjustments..................................................................... 46
28. Main Gas Burner Air Inlet Shutters (Gas Models).................. 46
29. Airflow Switch (Gas and Electric Models).............................. 47
30. Loading Door Strike................................................................. 48
31. Drive Belt Tension................................................................... 48
32. Cylinder Clearance................................................................... 51
Section 5 – Micro Display Control (MDC) Troubleshooting.......... 52
33. Coins Ignored When Entered................................................... 52
34. Control Has No Display........................................................... 53
35. Door Open Indicator ................................................................ 55
36. Motor Will Not Start/Run........................................................ 57
37. Unit Will Not Heat – Gas......................................................... 60
38. Unit Will Not Heat – Steam..................................................... 63
39. Unit Will Not Heat – Electric .................................................. 66
40. Error Codes.............................................................................. 69
Section 6 – NetMaster Troubleshooting – KT075 Models Only..... 70
41. No Infrared Communication.................................................... 71
42. Coins Ignored When Entered................................................... 72
43. No Display ............................................................................... 73
44. “Door Open” Indicator............................................................. 75
45. No Start/Run ............................................................................ 77
46. Unit Will Not Heat – Gas......................................................... 79
47. Unit Will Not Heat – Steam..................................................... 82
48. Unit Will Not Heat – Electric .................................................. 84
49. CE Models No Display............................................................ 87
50. CE Models “Door Open” Indicator.......................................... 89
51. CE Models No Start/Run ......................................................... 91
52. CE Models Will Not Heat – Gas.............................................. 93
53. CE Models Will Not Heat – Steam.......................................... 96
54. CE Models Will Not Heat – Electric ....................................... 98
Section 8 – On Premise Micro Control (OM) Troubleshooting..... 101
55. Control Has No Display........................................................... 102
56. Door Open Indicator ................................................................ 104
57. Motor Will Not Start/Run........................................................ 106
58. Unit Will Not Heat – Gas......................................................... 109
59. Unit Will Not Heat – Steam..................................................... 112
60. Unit Will Not Heat – Electric .................................................. 114
61. Error Codes.............................................................................. 117

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Section 9 – Hybrid Timer Control Troubleshooting....................... 118
62. Coins Ignored When Entered................................................... 118
63. Control Has No Display – QT and RQ
Control Suffixes....................................................................... 119
64. Display Flashes “dr” With Door Closed – QT and RQ
Control Suffixes....................................................................... 121
65. Vend Satisfied, No In Use LED – SD and SX
Control Suffixes....................................................................... 124
66. In Use LED Lit, No Motor Run – SD and SX
Control Suffixes....................................................................... 127
67. Motor Will Not Start/Run – SD and SX Control Suffixes....... 129
68. Motor Will Not Start/Run – QT and RQ Control Suffixes...... 131
69. Unit Will Not Heat – Gas – SD and SX Control Suffixes....... 133
70. Unit Will Not Heat – Gas – QT and RQ Control Suffixes ...... 136
71. Unit Will Not Heat – Electric – QT and RQ
Control Suffixes....................................................................... 139
72. Error Codes.............................................................................. 142
Section 10 – Quantum Control Troubleshooting............................. 143
73. No Infrared Communication.................................................... 144
74. Coins Ignored When Entered................................................... 145
75. No Display ............................................................................... 146
76. “Door Open” Indicator............................................................. 148
77. No Start/Run ............................................................................ 150
78. Unit Will Not Heat – Gas......................................................... 153
79. Unit Will Not Heat – Steam..................................................... 156
80. Unit Will Not Heat – Electric .................................................. 158
81. CE Models No Display............................................................ 162
82. CE Models “Door Open” Indicator.......................................... 164
83. CE Models No Start/Run ......................................................... 166
84. CE Models Will Not Heat – Gas/Steam................................... 169
85. CE Models Will Not Heat – Electric ....................................... 172

470422101
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Section 1
Safety Information
Throughout this manual and on machine decals, you
will find precautionary statements (“CAUTION”,
“WARNING”, and “DANGER”) followed by specific
instructions. These precautions are intended for the
personalsafety oftheoperator, user, servicer,andthose
maintaining the machine.
Additional precautionary statements (“IMPORTANT”
and “NOTE”) are followed by specific instructions.
IMPORTANT: The word “IMPORTANT” is used
to inform the reader of specific procedures where
minor machine damage will occur if the procedure
is not followed.
NOTE: The word “NOTE” is used to communicate
installation, operation, maintenance or servicing
information that is important but not hazard
related.
In the interest of safety, some general precautions
relating to the operation of this machine follow.
Danger indicates an imminently hazardous
situation that, if not avoided, will cause
severe personal injury or death.
DANGER
Warning indicates a hazardous situation
that, if not avoided, could cause severe
personal injury or death.
WARNING
Caution indicates a hazardous situation
that, if not avoided, may cause minor or
moderate personal injury or property
damage.
CAUTION
• Failure to install, maintain and/or operate
this product according to the
manufacturer’s instructions may result in
conditions which can produce serious
injury, death and/or property damage.
• Do not repair or replace any part of the
product or attempt any servicing unless
specifically recommended or published
in this Service Manual and unless you
understand and have the skills to carry
out the servicing.
• Whenever ground wires are removed
during servicing, these ground wires
must be reconnected to ensure that the
product is properly grounded and to
reduce the risk of fire, electric shock,
serious injury or death. W006R2
WARNING

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Safety Information
IMPORTANT INFORMATION: During the
lifetime of a tumbler, it may require service. The
information contained in this manual was written
and is intended for use by qualified service
technicians who are familiar with the safety
procedures required in the repair of a tumbler, and
who are equipped with the proper tools and testing
equipment.
NOTE: The WARNING and IMPORTANT
instructionsappearinginthis manualarenot meant
to cover all possible conditions and situations that
may occur. It must be understood that common
sense, caution and carefulness are factors which
CANNOT be built into this tumbler. These factors
MUST BE supplied by the person(s) installing,
maintaining or operating the tumbler.
Always contact your dealer, distributor, service agent
or the manufacturer on any problems or conditions you
do not understand.
To reduce the risk of electric shock, fire,
explosion, serious injury or death:
• Disconnect electric power to the tumbler
before servicing.
• Never start the tumbler with any guards/
panels removed.
• Whenever ground wires are removed
during servicing, these ground wires
must be reconnected to ensure that the
tumbler is properly grounded. W240
WARNING
Repairs that are made to your products by
unqualified persons can result in hazards
due to improper assembly or adjustments
subjecting you, or the inexperienced
person making such repairs, to the risk of
serious injury, electrical shock, or death.W007
WARNING
If you or an unqualified person perform
service on your product, you must assume
the responsibility for any personal injury or
property damage which may result. The
manufacturer will not be responsible for
any injury or property damage arising from
improper service and/or service
procedures. W008
CAUTION

670422101
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Safety Information
Locating an Authorized Service
Person
Alliance Laundry Systems is not responsible for
personal injury or property damage resulting from
improper service. Review all service information
before beginning repairs.
Warranty service must be performed by an
authorized technician, using authorized factory
parts. If service is required after the warranty
expires, Alliance Laundry Systems also
recommends contacting an authorized technician
and using authorized factory parts.
Safety Warnings and Decals
SAFETY WARNINGS and decals have been provided
inkey locations toremindyou of important precautions
forthe safe operationand maintenanceof yourtumbler.
Please take the time to review these warnings before
proceeding with service work.
All decals have been designed and applied to withstand
washing and cleaning. Decals should be checked
periodically to be sure they have not been damaged,
removed, or painted.
Safety Precautions for Servicing
Tumblers
Prior to servicing tumbler:
Disconnect electrical service and “lockout” to
prevent unintentional connection.
Shut off supply gas valve.
Allow machine to cool prior to servicing.
After servicing tumbler:
Control/access panels must be reinstalled.
Motor/drive/belt guards must be reinstalled.
Contactor/junction/accessory box covers must
be reinstalled.
Use a non-corrosive leak detection solution to
check all pipe connections for gas leaks. DO
NOT USE AN OPEN FLAME TO CHECK
FOR GAS LEAKS!
The loading door switch, lint door switch and
airflow switch must be operating properly.

70422101 7
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Section 2
Introduction
Model Identification
Information in this manual is applicable to these models:
Gas Steam/Thermal Oil Electric
50
Pound
CA050L
CA050N
CT050L
CT050N
CU050L
CU050N
DR55G2-BA050L
DR55G2-BA050N
DR55G2-BT050D
DR55G2-BT050L
DR55G2-BT050N
DR55G2-BU050L
DR55G2-BU050N
GA050L
GA050N
GT050L
GT050N
GU050L
GU050N
HA050L
HA050N
HT050D
HT050L
HT050N
HU050L
HU050N
IPD50G2-IT050L
IPD50G2-IT050N
KA050L
KA050N
KT050L
KT050N
KU050L
KU050N
LA050L
LA050N
LT050L
LT050N
LU050L
LU050N
PA050L
PA050N
PT050L
PT050N
PU050L
PU050N
SA050L
SA050N
ST050D
ST050L
ST050N
SU050L
SU050N
UA050L
UA050N
UT050L
UT050N
UU050L
UU050N
YT050L
YT050N
CT050S
CT050T
CU050S
CU050T
DR55S2-BT050S
DR55S2-BT050T
DR55S2-BU050S
DR55S2-BU050T
GT050S
GT050T
GU050S
GU050T
HT050S
HT050T
HU050S
HU050T
IPD50S2-IT050S
IPD50S2-IT050T
KT050S
KT050T
KU050S
KU050T
LT050S
LT050T
LU050S
LU050T
PT050S
PT050T
PU050S
PU050T
ST050S
ST050T
SU050S
SU050T
UT050S
UT050T
UU050S
UU050T
YT050S
YT050T
CT050E
CU050E
DR55E2-BT050E
DR55E2-BU050E
GT050E
GU050E
HT050E
HU050E
IPD50E2-IT050E
KT050E
KU050E
LT050E
LU050E
PT050E
PU050E
ST050E
SU050E
UT050E
UU050E
YT050E
(continued)
NOTE: Control suffixes listed on next page.

870422101
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Introduction
Includes models with the following control suffixes:
75
Pound
CA075L
CA075N
CT075L
CT075N
CU075L
CU075N
DR80G2-BA075L
DR80G2-BA075N
DR80G2-BT075D
DR80G2-BT075L
DR80G2-BT075N
DR80G2-BU075L
DR80G2-BU075N
GA075L
GA075N
GT075L
GT075N
GU075L
GU075N
HA075L
HA075N
HT075D
HT075L
HT075N
HU075L
HU075N
IPD75G2-IT075L
IPD75G2-IT075N
KA075L
KA075N
KT075L
KT075N
KU075L
KU075N
LA075L
LA075N
LT075L
LT075N
LU075L
LU075N
PA075L
PA075N
PT075L
PT075N
PU075L
PU075N
SA075L
SA075N
ST075D
ST075L
ST075N
STF75L
STF75N
SU075L
SU075N
UA075L
UA075N
UT075L
UT075N
UTF75L
UTF75N
UU075L
UU075N
YT075L
YT075N
CT075S
CT075T
CU075S
CU075T
DR80S2-BT075S
DR80S2-BT075T
DR80S2-BU075S
DR80S2-BU075T
GT075S
GT075T
GU075S
GU075T
HT075S
HT075T
HU075S
HU075T
IPD75S2-IT075S
IPD75S2-IT075T
KT075S
KT075T
KU075S
KU075T
LT075S
LT075T
LU075S
LU075T
PT075S
PT075T
PU075S
PU075T
ST075S
ST075T
SU075S
SU075T
UT075S
UT075T
UU075S
UU075T
YT075S
YT075T
YU075S
YU075T
CT075E
CU075E
DR80E2-BT075E
DR80E2-BU075E
GT075E
GU075E
HT075E
HU075E
IPD75E2-IT075E
KT075E
KU075E
LT075E
LU075E
PT075E
PU075E
ST075E
SU075E
UB075E
UT075E
UU075E
YT075E
YU075E
3O - DX4 OPL LC - network adaptable coin R3 - reversing DX4 OPL
3V - DX4 vended LX - network adaptable,
prep for coin RD - reversing DMP OPL 3X - DX4 prep for coin RM - reversing OPL micro
BC - basic electronic, coin LY - network adaptable,
prep for card RQ - reversing dual digital timer BL - basic electronic, central pay SD - single drop
BX - basic electronic, prep for coin NC - NetMaster coin SX - single drop, prep for coin
BY - basic electronic, prep for card NX - NetMaster, prep for coin WC - network ready coin
DO - DMP OPL NY - NetMaster, prep for card WX - network ready, prep for coin
DV - DMP vended OM - OPL micro WY - network ready, prep for card
DX - DMP prep for coin QT - dual digital timer
Gas Steam/Thermal Oil Electric

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Introduction
Serial Plate Location
When calling or writing about your product, be sure to
mention model and serial numbers. Model and serial
numbers are found on serial plate on the rear of
machine and inside door.
Customer Service
If literature or replacement parts are required, contact
the source from which the machine was purchased or
contact Alliance Laundry Systems at [phone]
for the name and address of thenearest authorized parts
distributor.
For technical assistance, call [phone].
Wiring Diagram
The wiring diagram is located inside the junction or
contactor box.
The wiring diagram part number is in the lower portion
of the electrical data on the serial plate.
10
20
4030
50
60
0
10
5
PUSH
TO
START
HEAT COOL
DOWN
HIGH
TEMPERATURE
LOW
15
0
Serial
Plate
TMB2235N

10 70422101
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Introduction
How a Tumbler Works
A tumbler uses heated air to dry loads of laundry.
When the motor is started, the exhaust fan pulls
room temperature air in through the air intake at
the rear of the tumbler and over the heat source
(burner flame for gas, heating element for
electric, and coil for steam).
The heated air moves into the cylinder, where it is
circulated through the wet load by the tumbling
action of the cylinder.
The air then passes through the lint filter, exhaust
fan, and is vented to the outdoors.
Theory of Operation of Instant
Electronic Ignition
IMPORTANT: The Non-CE Marked Instant
Electronic Ignition system will attempt to light the
gas by sparking for approximately 15 seconds. If
gas ignition does not take place within
approximately 15 seconds, the Instant Electronic
Ignition control will go into safety lockout and the
valve will no longer open until Instant Electronic
Ignition control is reset. To reset Instant Electronic
Ignition control, remove power from control by
opening and closing the tumbler door. If condition
persists, check that the gas shut-off valve is in “on”
position and that the gas service is properly
connected.
If condition persists:
1. Check resistance of high tension lead
(approximately 1000 ohms/inch), and replace if
not within resistance range.
2. Check voltage present at valve.
3. Check that machine is properly grounded.
4. Check the gap between igniter and burner tube
(gap should be 1/4-3/8 inch).
5. Check that burner ports are not blocked or
plugged under the igniter.
TMB2347S
1
3
2
TMB2347S
1
2
3

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Section 3
Troubleshooting
IMPORTANT: Refer to appropriate wiring
diagram for aid in testing tumbler components.
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded. W002
WARNING

12 70422101
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Troubleshooting
1. Motor Does Not Start
Motor does
not start
Is electrical
power off or
have any fuses
blown?
Check power
and fuses.
Replace fuses
if necessary.
Is loading door
open or is door
switch
inoperative?
No
Close door or
test switch and
replace if
inoperative.
Is lint door
open or is lint
door switch
inoperative?
Close lint door,
confirm switch
is positioned to
actuate with
door closed.
Is
trunnion shaft
assembly
binding in
trunnion housing
bearings?
Replace trunnion
housing bearings.
Is start
circuit
incomplete?
Yes
Yes
Press start switch or
test switch and replace
if inoperative.
Yes
Is idler shaft
binding in idler
housing
bearings?
Replace
bearings.
Yes
Is motor
inoperative?
Have motor tested and
replace if inoperative.
Yes
Non-Metered
Models: Is
timer set
properly?
Turn drying timer clockwise
to desired setting.
Non-Metered
Models: Are the
timer or relay
inoperative?
No
Test timer and relay and
replace if inoperative.
Metered
Models:
Are proper coins
inserted in
accumulator?
If motor still does
not start, replace
motor.
Check that proper
coins are inserted.
Yes
Yes
No
No
No
No
Yes
No
No
Yes
Yes
No
TMB2264S
No
TMB2264S

70422101 13
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Troubleshooting
2. Motor Overload Protector Cycles Repeatedly
Motor overload
protector
cycles
repeatedly
Is voltage
incorrect?
Refer to the
Installation
Manual for
electrical
requirements.
Is clothes
load too
large?
Remove part of
load.
Is clothes
cylinder
binding?
Check cylinder
for binding.
Refer to
Adjustments
Section for
cylinder
adjustment.
Is wiring
inadequate?
Check with an
electrician to
ensure that
wiring is
adequate.
Is make-up
air
inadequate?
Refer to
Installation
Manual for
make-up air
requirements.
Has lint
built up?
Clean lint
accumulation
on and around
motor.
Is there broken,
loose or
incorrect wiring?
Refer to wiring
diagram
located inside
contactor box.
TMB1874S
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
TMB1874S

14 70422101
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Troubleshooting
3. Motor Runs But Cylinder Does Not Turn
Motor runs but
cylinder does
not turn
Is motor
drive
pulley
loose?
Confirm key is
in place,
tighten
setscrews.
Is sheave
loose?
Confirm key is
in place,
tighten
setscrews and
bushing.
Is belt
broken
or loose?
Replace or
adjust belt.
Is
cylinder
binding?
Check cylinder
for binding.
Refer to
Adjustments
Section for
proper cylinder
adjustment.
Does cylinder turn
counterclockwise when
viewed from front of
machine (3 Phase
models only)?
Switch power
leads L1 and
L2 to correct
rotation.
TMB1875S
Yes
No
Yes
No
Yes
No
Yes
No
Yes
TMB1875S

70422101 15
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Troubleshooting
4. Motor Does Not Stop
Motor does not
stop
Is door
switch
inoperative?
Test switch and
replace if
inoperative.
Non-Metered
Models: Is timer
or relay
inoperative?
Test timer and
relay and
replace if
inoperative.
Metered
Models: Is
accumulator
inoperative?
Tes t
accumulator
and replace if
inoperative.
Is motor relay
or motor
contactor
inoperative?
Check
relay/contactor
and replace if
inoperative.
TMB1876S
Yes
No
Yes
No
Yes
Yes
Is wiring
incorrect?
Refer to wiring
diagram
located inside
contactor box.
No
Yes
No
TMB1876S

16 70422101
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Troubleshooting
5. Heating Element Does Not Heat or Burner Does Not Ignite
Heating element
does not heat or
burner does not
ignite
Is there
improper or
inadequate
exhaust or
make-up air?
Refer to
Installation
Manual for
exhaust and
make-up air
requirements.
Are there
blown fuses
or tripped
circuit
breakers?
Check fuses
or circuit
breakers.
Is drying
timer not
selected or
inoperative?
Set drying
timer or
replace if
necessary.
Is "No Heat"
selected on
control?
Select
temperature
option.
Is control
relay
inoperative?
Test relay and
replace if
inoperative.
Is thermistor
inoperative?
Test thermistor by
removing harness from
thermistor terminals.
Check resistance across
terminals, should read
approximately 50,000
Ohms at 77°F.
Resistance should
decrease with a
temperature increase.
Replace thermistor if
inoperative.
Electric Models:
Are heating
elements or
contactors
inoperative?
Check heat
contactors
and elements.
Replace if
necessary.
Gas Models:
Is gas supply
insufficient?
Open partially closed gas
shut-off valve, or correct
low gas pressure. Check
inlet pressure and
compare to pressure
specified on serial plate.
If pressure cannot be
obtained, contact gas
supplier.
Continued on
next page
Gas Models:
Are orifices
incorrect?
Tumbler is equipped
for type of gas
specified
on serial plate at
0-2,000 feet altitude.
Refer to Installation
Manual .
Ye s
No
Ye s
No
Ye s
No
Ye s
No
Ye s
No
Ye s
No
Ye s
No
Ye s
No
Ye s
No
TMB2324S-a
TMB2324S-a

70422101 17
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Troubleshooting
5. Heating Element Does Not Heat or Burner Does Not Ignite (continued)
Clean lint
compartment after
every eight hour shift.
Continued from
previous page
Gas Models:
Are gas valve coils
inoperative?
Test coils and
replace if
available as a
service part,
otherwise
replace valve.
Gas Models:
Is igniter
inoperative?
Gas Models:
Is igniter control
inoperative?
Test igniter and
replace if
inoperative.
Test igniter
control and
replace if
inoperative.
Is
airflow switch
inoperative?
Check back draft
damper for foreign
objects, lint
accumulation or other
causes that may
prevent damper from
opening.
Check ductwork for lint
build-up. Refer to
Installation Manual to
ensure that ductwork
and make-up air
openings are sized
properly.
Check exhaust outlet. If
a screen has been
installed on the outlet, it
may be clogged with
lint or frozen over in
winter. NEVER install a
screen over the
exhaust outlet.
Is lint door
panel not
closed
properly?
Open lint door
panel. Place lint
door panel back on
tumbler ensuring a
tight fit.
Is there
broken, loose
or incorrect
wiring?
Refer to wiring
diagram
located inside
contactor box.
Ye s
No
Ye s
No
Ye s
No
Gas and Electric
Models: Is high
limit thermostat
inoperative?
Test thermostat
and replace if
inoperative.
Ye s
No
Yes
No
Ye s
No
Ye s
TMB2324S-b
No
TMB2324S-b

18 70422101
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Troubleshooting
6. Igniter Does Not Shut Off After Gas Ignition — Gas Burner
Igniter does not
shut off after
gas
ignition - gas
burner
Is tumbler not
properly equipped for
type of gas being
used?
Tumbler is equipped for
type of gas specified on
serial plate at 0-2,000
feet altitude. Refer to
Installation Manual.
Is there
insufficient gas
supply?
Open partially
closed gas shut-off
valve or correct low
gas pressure.
Is burner flame
adjusted
improperly?
Refer to
Adjustments
Section for
recommended
burner flame
adjustment.
Is electrode assembly
incorrectly installed?
Check
assembly for
correct
alignment.
Is igniter control
inoperative?
Test igniter
control and
replace if
inoperative.
Is wiring
incorrect?
Refer to wiring
diagram
located inside
contactor box.
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
TMB1878S
TMB1878S