Alliance Laundry Systems HAT30N Operating instructions

www.alliancelaundry.com
Troubleshooting
Part No. 70304901R6
March 2013
Tumble Dryers
Stacked 30 Pound Capacity
Stacked 45 Pound Capacity
Starting Serial No. 0602004144
Refer to Page 7 for Model Numbers
START
25
C
HIGH
TEMP
MED
TEMP
LOW
TEMP
NO
HEAT
123
SELECT
TEMP
INSERT
COIN
PUSH
START
123
SELECT
TEMP
INSERT
COIN
PUSH
START
START
25
C
HIGH
TEMP
MED
TEMP
LOW
TEMP
NO
HEAT
T464PZ3A

© Copyright 2013, 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.
70304901R6 1
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Table of
Contents
Section 1 – Safety Information ...............................................................4
Locating an Authorized Service Person ................................................6
Safety Warnings and Decals..................................................................6
Safety Precautions for Servicing Tumble Dryers..................................6
Section 2 – Introduction ..........................................................................7
Model Identification ..............................................................................7
Serial Plate Location..............................................................................9
Customer Service...................................................................................9
Wiring Diagram.....................................................................................9
How A Tumble Dryer Works ..............................................................10
Section 3 – Troubleshooting..................................................................11
1. Tumble Dryer Does Not Start .....................................................12
2. Motor Does Not Start..................................................................13
3. Motor Overload Protector Cycles Repeatedly ............................14
4. Motor Runs But Cylinder Does Not Turn...................................15
5. Motor Does Not Stop ..................................................................16
6. No Heat Condition (Non-CE and Non-Australian Models)........17
7. Burner Does Not Ignite...............................................................19
8. Burner Ignites and Goes Out Repeatedly....................................22
9. Burner Does Not Shut Off ..........................................................23
10. Clothes Do Not Dry ....................................................................24
11. Tumble Dryer Overheating .........................................................26
12. Burner Not Burning Properly......................................................27
13. Loading Door Opens During Operation......................................28
14. Cylinder Continues to Spin with Door Open..............................29
15. Coin Does Not Fall into Coin Vault or Coin Drop Sensor
Does Not Register That Coin Has Been Entered ........................30
16. Cylinder Is “Stained” ..................................................................33
Section 4 – Adjustments ........................................................................34
17. Loading Door Switch..................................................................34
18. Loading Door Strike....................................................................34
19. Aligning Door Strike...................................................................35
20. Cleaning Coin Drop ....................................................................35
Section 5 – Micro Display Control (MDC) Troubleshooting.............38
Models with BC, BG, BL, BX and BY Control Suffixes
21. Coins Ignored When Entered......................................................38
22. Control Has No Display..............................................................39
23. Door Open Indicator ...................................................................41
24. Motor Will Not Start/Run ...........................................................43
25. Unit Will Not Heat – Gas............................................................47
26. Unit Will Not Heat – Steam (T30 Models Only)........................50
27. Unit Will Not Heat – Electric (T30 Models Only) ....................53
28. Error Codes .................................................................................56

270304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Gas and Steam Models
Control Circuit Schematic.................................................................57
Control Circuit Connection Diagram................................................58
Control Box Schematic .....................................................................59
Control Box Connection Diagram ....................................................60
Electric Models
Control Circuit Schematic.................................................................61
Control Circuit Connection Diagram................................................62
Contactor Box Schematic..................................................................63
Contactor Box Connection Diagram.................................................64
Section 6 – NetMaster Troubleshooting ..............................................65
Models with NC, NJ, NR, NX, NY, ZC, ZR, ZX and ZY
Control Suffixes
29. No Infra-red (IR) Communication ..............................................65
30. Coins Ignored When Entered......................................................66
31. Control Has No Display..............................................................67
32. Door Open Indicator ...................................................................70
33. Motor Will Not Start/Run ...........................................................73
34. Unit Will Not Heat – Gas............................................................79
Section 7 – Hybrid Timer Control Troubleshooting ..........................83
Models with QT, SD and SX Control Suffixes
35. Coins Ignored When Entered......................................................83
36. Control Has No Display – OPL Models .....................................84
37. Display Flashes “dr” With Door Closed – OPL Models ............87
38. Vend Satisfied, No In Use LED – Coin Models.........................90
39. In Use LED Lit, No Motor Run – Coin Models .........................94
40. Motor Will Not Start/Run – Coin Models ..................................97
41. Motor Will Not Start/Run – OPL Models.................................102
42. Unit Will Not Heat – Gas – Coin Models.................................107
43. Unit Will Not Heat – Gas – OPL Models .................................110
44. Unit Will Not Heat – Steam – OPL Models
(T30 Models Only)....................................................................113
45. Unit Will Not Heat – Electric Coin (T30 Models Only) ..........115
46. Unit Will Not Heat – Electric OPL (T30 Models Only) ..........119
47. Error Codes ...............................................................................123
Section 8 – Electronic Control Troubleshooting...............................124
Models with KC, KX, KY, LC, LX, LY, WC, WX and
WY Control Suffixes
48. No Infrared CommunicationL and W Control
Suffixes Only ............................................................................125
49. Coins Ignored When EnteredL and W Control
Suffixes Only ............................................................................126
50. No Display ................................................................................127
51. “Door Open” Indicator..............................................................129
52. No Start/Run .............................................................................131
53. Unit Will Not Heat – Gas..........................................................133
54. Unit Will Not Heat – Steam......................................................136
55. Unit Will Not Heat – Electric ...................................................138

70304901R6 3
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
56. CE Models No Display .............................................................141
57. CE Models No Start/Run ..........................................................145
58. CE Models Will Not Heat – Electric ........................................150
Section 9 – LED OPL Control Troubleshooting...............................153
Models with EO Control Suffix
59. No Fan and/or Drive Motor Rotation........................................154
60. Stove and Cabinet Limit Errors ................................................157
61. No Display ................................................................................159
62. Airflow Errors ...........................................................................161
63. Fan Motor Centrifugal Switch Error.........................................163
64. Close Door Indication ...............................................................165
65. Moisture Sensor Error...............................................................167
Troubleshooting the Moisture Sensor Circuit ...................................169
66. Troubleshooting at the Control .................................................169
67. Troubleshooting From Control to Slip Ring Assembly............171
68. Troubleshooting At Slip Ring Assembly..................................173
69. Troubleshooting From Slip Ring Assembly to Moisture
Sensing Baffle and Basket ........................................................173
70. Troubleshooting from Basket Shaft to Moisture Sensing
Baffle with Machine Basket Removed .....................................173
71. Troubleshooting at the Moisture Sensing Baffles with
Machine Basket Removed ........................................................174
72. Fan Motor Contactor Error .......................................................175
73. Rotation Sensor Error................................................................177
74. Shorted or Open Thermistor .....................................................179
75. Fuses and Transformer Configuration Jumper..........................181
76. Dip Switch/Harness Index Mismatch .......................................182
77. Electronic Control Testing ........................................................183

470304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
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
personal safety of the operator, user, servicer, and those
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 that you
understand and have the skills to carry
out.
• 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.
W006R1
WARNING

70304901R6 5
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Safety Information
IMPORTANT INFORMATION: During the
lifetime of a tumble dryer, 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 tumble dryer,
and who are equipped with the proper tools and
testing equipment.
NOTE: The WARNING and IMPORTANT
instructions appearing in this manual are not 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 tumble dryer. These
factors MUST BE supplied by the person(s)
installing, maintaining or operating the tumble
dryer.
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 tumble
dryer before servicing.
• Never start the tumble dryer with any
guards/panels removed.
• Whenever ground wires are removed
during servicing, these ground wires
must be reconnected to ensure that the
tumble dryer is properly grounded.
W240R1
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

670304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
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
in key locations to remind you of important precautions
for the safe operation and maintenance of your tumble
dryer. 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
Tumble Dryers
Prior to servicing tumble dryer:
•Disconnect electrical service and “lockout” to
prevent unintentional connection.
•Shut off supply gas valve.
•Allow machine to cool prior to servicing.
After servicing tumble dryer:
•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.

70304901R6 7
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Section 2
Introduction
Model Identification
Information in this manual is applicable to these models.
Gas Steam Electric
T30
CHD30STG2-CAT30L
CHD30STG2-CAT30N
CHD30STG2-CTT30L
CHD30STG2-CTT30N
CHD30STG2-CUT30L
CHD30STG2-CUT30N
CKT30N
DR335
DR335G2-BKT30N
DRST30G2-BAT30L
DRST30G2-BAT30N
DRST30G2-BTT30D
DRST30G2-BTT30L
DRST30G2-BTT30N
DRST30G2-BUT30L
DRST30G2-BUT30N
GAT30L
GAT30N
GKT30N
GTT30L
GTT30N
GUT30L
GUT30N
HAT30L
HAT30N
HKT30N
HTT30D
HTT30L
HTT30N
HUT30L
HUT30N
IPD30STG2
ITT30L
ITT30N
KAT30L
KAT30N
KKT30N
KTT30L
KTT30N
KUT30L
KUT30N
LAT30L
LAT30N
LKT30N
LTT30L
LTT30N
LUT30L
LUT30N
MTT30N
NTT30N
PAT30L
PAT30N
PKT30N
PTT30L
PTT30N
PUT30L
PUT30N
SAT30L
SAT30N
SKT30N
STT30D
STT30L
STT30N
SUT30L
SUT30N
UAT30L
UAT30N
UKT30N
UTT30L
UTT30N
UUT30L
UUT30N
CHD30STS2-CTT30S
CHD30STS2-CUT30S
DRST30S2-BTT30S
DRST30S2-BUT30S
GTT30S
GUT30S
HTT30S
HUT30S
IPD30STS2
ITT30S
KTT30S
KUT30S
LTT30S
LUT30S
PTT30S
PUT30S
STT30S
SUT30S
UTT30S
UUT30S
CHD30STE2-CTT30E
CHD30STE2-CUT30E
DRST30E2-BTT30E
DRST30E2-BUT30E
GTT30E
GUT30E
HTT30E
HUT30E
IPD30STE2
ITT30E
KTT30E
KUT30E
LTT30E
LUT30E
PTT30E
PUT30E
STT30E
SUT30E
UTT30E
UUT30E
T45
CKT45N
CTT45L
CTT45N
DR445G2-BAT45L
DR445G2-BAT45N
DR445G2-BKT45N
DR445G2-BTT45D
DR445G2-BTT45L
DR445G2-BTT45N
DR445G2-BUT45L
DR445G2-BUT45N
DRST45G2-BAT45L
DRST45G2-BAT45N
DRST45G2-BTT45D
DRST45G2-BTT45L
DRST45G2-BTT45N
DRST45G2-BUT45L
DRST45G2-BUT45N
GAT45L
GAT45N
GKT45N
GTT45L
GTT45N
GUT45L
GUT45N
HAT45L
HAT45N
HKT45N
HTT45D
HTT45L
HTT45N
HUT45L
HUT45N
IPD45STG2
ITT45L
ITT45N
KAT45L
KAT45N
KKT45N
KTT45L
KTT45N
KUT45L
KUT45N
MTT45N
NTT45N
SAT45L
SAT45N
SKT45N
STT45D
STT45L
STT45N
SUT45L
SUT45N
UAT45L
UAT45N
UKT45N
UTT45L
UTT45N
UUT45L
UUT45N
Not Applicable Not Applicable
See next page for Control Suffixes

870304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Introduction
Includes models with the following control suffixes:
3O – DX4 OPL EO – LED OPL NY – NetMaster, prep for card
3V – DX4 vended KC – single coin QT – dual digital timer
3X – DX4 prep for coin KX – prep for coin SD – single drop
BC – basic electronic, coin KY – prep for card SX – single drop, prep for coin
BG – basic electronic, OPL mode LC – network adaptable coin WC – network ready coin
BL – basic electronic, central pay LX – network adaptable, prep for coin WX – network ready, prep for coin
BX – basic electronic, prep for coin LY – network adaptable, prep for card WY – network ready, prep for card
BY – basic electronic, prep for card NC – NetMaster coin ZC – NetMaster network coin
DO – DMP OPL NJ – micro, prep single card reader ZR – NetMaster network card
DV – DMP vended NR – NetMaster card ZX – NetMaster network, prep for coin
DX – DMP prep for coin NX – NetMaster, prep for coin ZY – NetMaster network, prep for card

70304901R6 9
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Introduction
Serial Plate Location
When calling or writing for information about your
product, be sure to mention model and serial numbers.
Model and serial numbers are found on the serial plate
on the rear of the machine and inside the upper loading
door hinge.
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 the nearest authorized parts
distributor.
For technical assistance, call [phone].
Wiring Diagram
The wiring diagram is located inside the contactor or
junction box.
The wiring diagram part number is located in the lower
portion of the electrical data on the serial plate.
TMB1974N
1Serial Plate
1

10 70304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Introduction
How A Tumble Dryer Works
A tumble dryer 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 tumble dryer 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.
1
2
3
T002CE3A
1
2
3

70304901R6 11
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Section 3
Troubleshooting
IMPORTANT: Refer to wiring diagram for aid in
testing tumble dryer components.
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumble dryer before servicing.
• Close gas shut-off valve to gas tumble dryer before servicing.
• Close steam valve to steam tumble dryer before servicing.
• Never start the tumble dryer with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumble dryer is properly grounded.
W002R1
WARNING

12 70304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting
1. Tumble Dryer Does Not Start
Tumble Dryer
does not start
Is motor
relay
inoperative?
Test relay and
replace if
necessary.
Yes
Is
loading door
open?
No
Close loading
door
completely.
Is
drying timer in
an off position
(Manual Timer
Models)?
Yes Turn drying
timer on.
Check that
proper amount
of coins are
inserted.
Is the
PUSH-TO-START
button not properly
activated (Manual
Timer Models)?
Press and
hold
PUSH-TO-
START button
for three
seconds.
Is the
electrical power
off or circuit
breaker or fuse
blown?
Close and
lock lint
panel.
Check fuse
(in junction box)
and replace if
necessary.
Is
there a
blown fuse
on tumble
dryer?
Test coin drop
and replace if
inoperative.
Yes
Is coin drop
inoperative?
Is there an
incorrect
amount of coins
inserted into
coin drop?
No
No
Yes
No
Yes
Check power
supply, or
replace fuses.
No
Is the lint
panel
open?
No
Yes
No
Yes
Yes
TMB1902SR1
Yes
No
TMB19102SR1

70304901R6 13
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting
2. Motor Does Not Start
Motor does
not start
Is the
electrical power
off or circuit
breaker fuse
blown?
No
Is the
loading door
switch or lint
panel switch not
closed or switch
inoperative?
Is the
door switch
improperly
adjusted?
No
Check power
supply, or replace
fuses.
Ye s
Close door, panel
or test switch and
replace if
inoperative.
Ye s
Refer to Adjustments
Section for door
switch adjustment.
Ye s
Is the start
circuit not
complete?
Ye s Press and hold
PUSH-TO-START
button for three
seconds.
Is the motor
inoperative?
Ye s Have motor tested
and replace if
inoperative.
No
Is the
cylinder or
cylinder motor
binding?
No
Refer to wiring
diagram.
Ye s
Replace fan or
motor assembly.
Ye s
Replace cylinder,
bearing, rollers, or
motor assembly.
Ye s
Is the
transformer
inoperative?
Ye s Test and replace if
necessary.
Is the
motor relay
inoperative?
Ye s Test relay and replace
if inoperative.
Is
the fan or fan
motor
binding?
Is there
broken, loose,
or incorrect
wiring?
No
No
No
Is the
airflow switch
inoperative? (Only
on manual timer and
rotary coin
drop.)
Ye s Test switch,
replace or adjust
as required.
No
TMB1903S
No
No
TMB1903S

14 70304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting
3. Motor Overload Protector Cycles Repeatedly
TMB1904S
Motor Overload
Protector
Cycles
Repeatedly
Is voltage
correct?
Refer to
Installation
Manual for
electrical
requirements.
Yes
Is clothes
load too
large?
No
Remove part of
load.
Yes
Is clothes
cylinder
binding?
Check cylinder
for binding.
Is wiring
adequate?
No
Yes
No
Check with
local power
company to
ensure that
wiring is
adequate.
Yes
Is make-up
air adequate?
Refer to
Installation
Manual for
make-up air
requirements.
No
Yes
Is
there lint
buildup around
tumble dryer or poor
maintenance?
Clean lint
accumulation
on and around
the motors.
No
Yes
Is there
broken, loose
or incorrect
wiring?
Refer to wiring
diagram.
No
Yes
TMB1904S

70304901R6 15
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting
4. Motor Runs But Cylinder Does Not Turn
Motor Runs
But Cylinder
Does Not Turn
Is cylinder
belt
broken?
Replace
cylinder belt.
Is cylinder
binding?
Check cylinder
for binding.
Yes
No
Yes
TMB1905S
TMB1905S

16 70304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting
5. Motor Does Not Stop
Motor Does
Not Stop
Is the door
switch or lint
drawer switch
not working
properly?
Test switches
and replace if
inoperative.
Is coin drop
not working
properly?
Test coin drop
and replace if
inoperative.
Is wiring
incorrect?
Refer to wiring
diagram.
Is electronic
control
inoperative?
Replace
electronic
control.
Is motor
relay
inoperative?
Test relay and
replace if
inoperative.
Yes
No
Yes
No
Yes
No
Yes
No
Yes
TMB1906S
TMB1906S

70304901R6 17
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting
6. No Heat Condition (Non-CE and Non-Australian Models)
Ignition Control Module Function
There are four components to the ignition system: the
module, the spark igniter, the high voltage cable and
ground wire. When 24 VAC is applied between the TH
and GND terminals on the module, the module will
send the high voltage signal to the igniter and 24 VAC
to the gas valve coils. Gas will hit the sparking igniter
and flame will be established. The igniter being
engulfed in flame will create a millivolt electric signal
that is sent back to the module by the high voltage
cable; this is what the module sees as flame
recognition. If the millivolt signal is not at the module
in ten seconds, the module will go into safety lockout.
The voltage will be cut from the igniter and gas valve
coils and will not be restored until voltage is cycled at
the module.
Intermittent Heat Test Procedure
On ignition control modules with date codes higher
than 08t2, perform the following test.
Start the tumble dryer and run for 10 minutes (verify
that the tumble dryer is heating properly). After the 10
minute cycle, re-start the tumble dryer and once again
verify the unit is heating. Repeat this procedure 3 times.
If the tumble dryer passes this test, the ignition control
module is operating properly and SHOULD NOT be
changed. Refer to Troubleshooting Manual for
additional service procedures.
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumble dryer before servicing.
• Close gas shut-off valve to gas tumble dryer before servicing.
• Close steam valve to steam tumble dryer before servicing.
• Never start the tumble dryer with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumble dryer is properly grounded.
W002R1
WARNING

18 70304901R6
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting
6. No Heat Condition (continued)
Is the Ignition Control
Module’s red light on?
No
No
Yes
Yes
Refer to
Paragraph 7.
Replace igniter and high
voltage lead. Retest unit. If
unit still does not spark,
replace module.
No
Refer to Paragraph 7
for heat circuit
troubleshooting.
Is there
24 volts AC between
the TH and GND terminals
on the module?
Yes
No
Check wiring between
gas valve and module.
If wiring is good,
replace module.
Yes
Yes
Is there continuity
between GND terminal on
module and machine?
No No
Does the igniter
spark but no
flame is produced?
No
Yes
Is there
24 volts AC at the gas
valve coils when igniter
is sparking?
Is the igniter
positioned properly
in the flame, and does the
flame look good?
Does the igniter
spark?
Verify that gas is supplied
to the machine. If gas and
voltage are present,
replace gas valve or coils.
Does the flame turn
off after igniter
stops sparking?
No
Yes
Replace module. Adjust position of
igniter and retest.
Yes
Verify machine is
properly grounded.
Replace igniter and
high voltage lead.
Retest unit. If it still
does not sense flame,
replace module.
TMB2395S