TriangleTube prestige Service manual

SERVICE TECHNICIAN’S
TR UBLE SH TING GUIDE
2008-36 TSG-PRESTIGE
prestige
Condensing
Water Boiler
Date revised: 12/6/10

INTR DUCTI N Page 1-2
SERVICING TIPS AND INSTRUCTI NS Page 3-4
C NTR L M DULE DISPLAY - GENERAL Page 5-9
PRESTIGE C NTR L M DULE DISPLAY Page 10-11
S FT L CK UT ERR R C DE Page 12-17
HARD L CK UT ERR R C DE Page 18-26
C MBUSTI N TEST / SETTINGS Page 27-28
INTERNAL WIRING / ELECTRICAL Page 29-31
REPLACEMENT PARTS Page 32-42
T RQUE SPECIFICATI NS Page 43
i
Table of Contents

1
Introduction
Definitions
Indicates a potentially hazardous situation which, if ignored, can result in death, serious injury or sub-
stantial property damage.
Indicates a potentially hazardous situation which, if ignored, can result in minor injury, property damage.
Indicates special instructions on installation, operation or maintenance, which are important to the equip-
ment/product, but not related to personal injury hazards.
This guide is to be used in conjunction with the PRESTIGE Boiler Installation and Maintenance Manual.
Procedures and servicing listed in this manual must be performed by a qualified service technician,
installer, service agency or gas supplier. Any procedures or service performed by an unqualified individ-
ual or service agency can result in severe personal injury, death or substantial property damage.
WARNING
NO ICE
WARNING
CAU ION

Introduction
2
Introduction
This guide is to be used in conjunction with the Triangle Tube PRESTIGE Boiler Installation and Maintenance Manual.
Good Troubleshooting Practices
Before leaving for the job site:
Check your parts and tools
• Test equipment and tools you will need:
Electrical meter that tests both voltage (AC/DC), continuity (ØW), resistance ( W,ohms), and frequency (Hz)
Temperature gauge or metering device
Manometer
Calibrated Combustion Analyzer
Standard tools of the trade (wrenches, screwdrivers...)
• Parts to solve most problems
Control module
Transformer with surge protection
Blower with gasket
PS 399 Parts Case - PSR IT102
PS 60-250 Parts Case - PSR IT103
Review all appropriate manuals before leaving for the job site
At the job site:
- Clarify problem
- Have the PRESTIGE manual and any other wiring, zone control or piping diagrams, or installation guides readily
available.
REMEMBER
Follow the Troubleshooting Guide step by step, always double checking your results. Skipping steps or not complet-
ing steps can lead to wrong conclusions, repeated visits to the job site, unhappy customers and unnecessary warran-
ty claims.

Servicing Tips and Instructions
3
Label all wires and wire connections prior to disconnecting when servicing any boiler controls. Wiring errors
can cause improper and dangerous operation. Always disconnect the power supply to the boiler before serv-
icing. Failure to comply could result in severe personal injury, death or substantial property damage.
Never bypass (jumper) any boiler, control or device except for momentary testing when troubleshooting the
boiler as outlined in this guide, severe personal injury, death or substantial property damage can result.
Initial Troubleshooting Checks
- Ensure all wire connectors to the control module and sensors are securely connected.
- Ensure the maximum gas supply pressure does not exceed 13”w.c. during flow or no flow conditions.
- Ensure the gas supply pressure is a minimum 5” w.c. during flow conditions (burner firing on all gas appliances).
Control Module Fuses
The control module contains 2 internal replaceable fuses. Ensure the fuses are in working condition prior to
replacing the control module or any boiler component. If one of the fuses has blown, it will prevent the con-
trol module and/or boiler components from operating properly.
To check or replace the control module fuses:
1. Disconnect the external power supply to the boiler.
2. Remove the front jacket panel of the boiler by removing the thumb screw along the top edge.
3. Remove the electrical connectors at the MCBA control module for the igniter, transformer and display (ribbon
cable) and the black plastic housing cover off the control module. Use care not to damage the cover when
removing it.
4. Remove both fuses and check for continuity to determine if fuse is blown, replace if necessary.
5. The control module is supplied from the factory with 2 spare fuses, a 5 amp fast acting fuse and a 4 amp slow
acting fuse, attached to the control module cover.
6. When replacing the fuses ensure the amp rating and type of the fuse matches the replacement fuse. Reference
Fig. 1, page 4 for amperage and location of the fuses.
Do not bypass any fuse with a jumper. Do not replace any fuse with a fuse that is not specified. Failure to
comply could result in severe personal injury, death or substantial property damage.
7. Re-install the control module cover, electrical connectors and the front jacket panel when completed.
WARNING
WARNING
WARNING
NO ICE

8. Reconnect the external power supply to the boiler and perform the verification of operation steps as outline in
the Prestige Installation Manual.
After completing any servicing of the boiler verify proper operation of the boiler. Steps to verify proper oper-
ation are outlined in the Start-Up Procedures in the PRESTIGE Boiler Installation and Maintenance Manual.
Failure to comply could result in severe personal injury, death or substantial property damage.
WARNING
Servicing Tips and Instructions
4
F1 Fuse Rating
5 - AMP/250V
Fast Acting
for 120V-High Voltage
120V-High Voltage
Electrical Quick
Connect
F3 Fuse Rating
4 - AMP/250V
Slow Acting
for 24V-Low Voltage
Control
Module
Fig. 1 Control Module Fuse Locations (Housing Cover Removed)

Standby Mode
After the boiler is turned on, the control panel will be in the
STANDBY mode.
This is the standard mode for the PRESTIGE. The control
automatically returns to this mode after 20 minutes if no
keys have been pressed on the display. Any parameters
that were modified are then stored.
The first character shows (on the left side of the display)
the current status of the boiler depending on the condition
of both the boiler and the burner. The last 3 characters
indicate the boiler supply temperature.
If the burner is blocked due to a “soft” lockout, the display
alternates between a 9 followed by the boiler supply tem-
perature and “b” with a two digit error code. See page 12
-17 for detailed information on the corrective and preven-
tive actions for the soft lockouts.
T TEMP RARILY PLACE THE BURNER
INT HIGH FIRE TEST M DE: press the MODE
button until “StbY” is displayed. hen press and
hold both the MODE and “+” buttons simultaneous-
ly until the first digit flashes “H”.
While in the test mode:
- high limit will function
- boiler CH circulator will function
- domestic circulator will not function
- the test mode will time out in approximately
10 minutes
T TEMP RARILY PLACE THE BURNER
INT L W FIRE TEST M DE: press the MODE
button until “StbY” is displayed. hen press and
hold both MODE and “-” buttons simultaneously
until the first digit flashes “L”.
T DEACTIVATE THE HIGH R L W FIRE
TEST M DE: press the MODE button until
“StbY” is displayed. hen press and hold both the
“+” and “-” buttons simultaneously to deactivate the
high or low fire test mode.
If the “+” button is held in, the CH system
(parameter 3) will be turned FF and the dis-
play will show “cOFF”. Press and hold the “+”
button to turn the CH system back N, the dis-
play will show “c” followed by CH set point. If
the “-” button is held in while in the “StbY”
mode, domestic system (parameter 2) will be
turned FF and the display will show “dOFF”.
Press and hold “-” button to turn the domestic
system back N, the display will show “d” fol-
lowed by domestic set point temperature.
StbY
NO ICE
Control Module Display - General
Internal check
Test function: Burner on, high fire mode
Test function: Burner on, low fire mode
A180
180
180
H
L
Display Boiler function
5

6
Control Module Display - General
STANDBY, no demand
Fan prepurge or post purge cycle
Ignition sequence
Burner ON for space heating (CH)
Burner ON for domestic hot water (DHW)
Pre-check for air flow prior to prepurge cycle
Burner OFF due to reaching temperature setpoint
Domestic hot water (DHW) post pump cycle
Space Heating (CH) post pump cycle
Burner blocked:
Supply temperature too high (202 F) . Burner
will remain OFF until temperature drops
below 200 F
Return temperature too high (202 F). Burner
will remain OFF until temperature drops
below 200 F
Return temperature is higher than
supply temperature. Burner will remain OFF
until corrected.
Supply temperature increased too quickly.
Burner will remain OFF for a 10 minute period.
Burner will recycle, increasing waiting period 1
minute for a max. 15 minutes
Factory supplied LWCO device or
external limit (terminals 15 & 16) is OPEN.
Burner off for 150 seconds, auto reset.
0
1
180
180
180
180
180
180
180
180
180
180
2
3
4
5
6
7
8
9
18
b
19
b
24
b
25
b
26
b
2
Display Boiler function
No blower signal
Blower signal present with no demand, Burner
will remain OFF until condition terminates
Temperature difference between the supply and
return is more than 72 F. Burner will remain OFF
for 150 seconds. Burner will recycle increasing
wating period 1 minute for a max. 20 cycle.
Flue temperature sensor is short-circuited.
Burner OFF until corrected
Flue temperature senor is “open” Burner OFF
until corrected.
Flue temperature greater than 240 F but less
than 250 F. Burner off for 150 seconds
Factory supplied LWCO device or external limit
(terminals 15 &16) is OPEN, while burner is fired.
Wait for the blower to start
8
b
2
2
9
b
30
b
35
b
40
b
Indirect water heater temperature sensor is
short-circuited. Burner OFF until corrected.
Indirect water heater temperature sensor is
“open” or disconnected. Burner OFF until
corrected.
33
b
38
b
52
b
19
b
65
b
Power frequency deviation
1
16
b
Flame current signal lost
18
b1
1
Standby Mode Display

Parameter Mode
To access PARAMETER mode when the system is in
STANDBY mode, press the MODE button once.
To scroll through the list of parameters, simply press the
“STEP” button. The First digit is the parameter number fol-
lowed by the parameter value. To modify a parameter
value, use the + or - keys. Then press “STORE” to save
the value you just changed. The display flashes once to
confirm the data has been saved.
To activate the parameters you changed, press RESET.
However, if you do not press a key, the system returns to
STANDBY mode after 20 minutes and automatically
stores the changes.
Note 1: This parameter is factory set to 140ºF. It is impor-
tant to note the control adds 46ºF to this setting, therefore
the actual domestic hot water boiler setpoint is 140ºF +
46ºF = 186ºF.
Note 2: This parameter should not be changed from the
factory setting of 01. The performance of the DHW
(Domestic Hot Water Heating) will be affected and can
become unreliable.
Note 3: This parameter should not be changed from the
factory setting of 01. The performance of the CH
(Central/Space Heating) will be affected and can become
unreliable.
ARA
P
ARA
P
MODE
Key: Display
Pressing MODE once
Domestic Hot Water Setting (See Note 1)
DHW Application Selection (See Note 2)
CH Application Selection (See Note 3)
CH Maximum Boiler Operating Setpoint
1.
2
140
01
01
8
16
3
4
.
.
.
.
STEP
STEP
STEP
STEP
Key: DisplayDescription ofparameters
7
Control Module Display - General

ARA
P
MODE
NFO
I
MODE
Key: Display
Pressing MODE once
Pressing MODE twice
J12
.34
.56
Information Mode Items
Display Digit
Segments
8
Control Module Display - General
Accessing Boiler Information
Information mode
To switch from STANDBY mode to Information mode,
press MODE twice.
Press STEP until the system displays the information you
need. The decimal point located behind the first position
flashes to indicate that the boiler is in INFO mode.
The ignition counters and burner hours are
split into three two digit numbers.
For example:
Write the numbers down from left to right to
arrive at 123,456 CH ignitions.
In the INF Mode a temperature reading of
-22 typically indicates an “open” circuit. A
temperature reading of 240 typically indicates
a short-circuit.
NO ICE
NO ICE
NFO
I
ARA
P
MODE
NFO
I
MODE
Key: Display
Pressing MODE once
Pressing MODE twice
J12
.34
.56

Error Hard Lockout Mode
If a serious fault occurs, the system enters a hard lockout
condition which requires a manual reset by pressing the
RESET Button. A hard lockout is indicated by displaying
an E for the first digit, followed by the error code.
For detailed information on the corrective and preventive
actions for the hard lockout, see pages 18-26.
The boiler freeze protection feature is disabled
during a Hard Lockout, however the CH circulator
will operate.
During a hard lockout or low water condition the
boiler will not re-start without service. If the heat-
ing system is left unattended in cold weather
appropriate safeguards or alarms should be
installed to prevent property damage.
An optional AM-4 Interface module kit, PSRKIT23
can be added to any Prestige to provide contacts
for an external alarm in the event the boiler enters
into a hard Lockout.
CAU ION
CAU ION
NO ICE
Control Module Display - General
9
Gas valve harness not properly connected
Failed ignition after 5 attempts
Power supply lost after lockout occured
Internal control failure
Internal control failure
E
E
0
2
03
0
4
0
8
0
9
E
E
E
Display Hard Lockout
Electrical Interference
0
5
E Internal control failure
0
6
E Internal control failure
0
7
E
Flame detected prior to burner startup
E
0
0
Internal control failure
External limit (terminals 13 & 14) is OPEN
Blower signal does not reset to zero
No blower signal present
Supply Temperature sensor is short circuited
1
1
1
2
1
5
1
6
29
28
E
E
E
E
E
EFlue Temperature exceeds 250 F
52
EInternal control error - failure to read parameters
61
E
Return Temperature sensor is short circuited
Supply Temperature sensor is OPEN
Return Temperature sensor is OPEN
Gas Valve Circuit failure
Internal control failure
Inadequate power supply to the fan
E
E
31
32
36
37
44
60
65
E
E
E
E
E
Flue Temperature sensor is short circuit
40
E
Return Temperature exceeds 212 F
Supply Temperature increased too rapidly
Internal control failure
Low voltage internal short or voltage backfeed
Internal control failure
Internal control failure
Internal control failure
1
7
1
9
25
1
3
E
E
E
E
Supply Temperature exceeds 212 F
1
8
E
Return temperature is higher than supply
temperature
24
E
E
1
4
Flue Temperature sensor is OPEN
35
E
EInternal control failure
15
ESupply or Return Temperature sensor drift
23
Invalid power frequency
Supply or Return Temperature failure
Supply or Return Temperature not changing
131
1
1
1
1
22
24
E
E
E

Boiler control display is blank
- Check for 120 volts at terminals L and N of the 120V terminal strip
• If no power is measured check the external power supply, external fuse or breaker.
-Check the internal fuse F1 by locating the control module and removing the black housing. The internal fuse F1 is
located in the right corner of the control module near the 120V high voltage electrical connector on the control as
shown in Fig. 1, page 4. See Servicing Tips and Instructions, page 3, for accessing the internal fuses of the con-
trol module.
• Disconnect electrical supply power to the boiler and remove the F1 fuse from the MCBA. Check continuity
across the fuse. If continuity is not present, the fuse has blown, replace the fuse with a 5 amp/250V fast acting
fuse. Check the wiring for possible causes for the fuse to blow.(shorted wiring to circulator)
- Check external wiring at 120V terminal strip and boiler internal wiring, ensure all wiring is properly connected, in
good condition and all control module and boiler connections are secure.
• Correct/replace any mis-wiring or wiring components if needed. If problem continues replace the control module.
Boiler display shows UI.25 or UI.22
- Check transformer connections
- Check the internal fuse F3 by locating the control module and removing the black housing. The internal fuse F3 is
located in the center of the control module as shown in Fig. 1 page 4. See servicing tips and instructions, page 3,
for accessing the internal fuses of the control module.
• Disconnect electrical supply power to the boiler and remove the F3 fuse from the MCBA.
• Check continuity across the fuse. If continuity is not present, the fuse has blown.
• If fuse F3 has blown, replace the fuse with a 4-amp/250V slow acting fuse. Check external boiler wiring for
exteral source of 24V backfeed.
Boiler display shows a 0 for the first digit on the left followed by 2 or 3 digits (boiler tem-
perature)
- Check to see if room and DHW thermostats are satisfied.
• If the thermostats are satisfied the boiler is off due to no call for heat. Turn up a thermostat and the boiler should
begin ignition sequence.
- If the room thermostat or DHW thermostat is calling for heat and the boiler is not firing and the boiler is below the
maximum operating temperature.
• Check and verify Parameters 2 and 3 are correct as outlined on page 7. Both parameters should be set as
“01”, which turns DHW and CH modes ON.
• Temporarily jump low voltage terminals 7 and 8 on the 24V terminal strip. If boiler operates check the room
thermostat wiring and thermostat control. Replace as needed. Remove jumper when completed.
• Temporarily jump low voltage terminals 11 and 12 on the 24V terminal strip. If boiler operates check the DHW
thermostat wiring and thermostat control. Replace as needed. Remove jumper when completed.
• Disconnect power to the boiler. Check all wiring and wiring connections and compare to the wiring diagram.
Ensure all wiring and wiring connection are in good condition and secure. If necessary, replace complete wiring
harness.
• Check for 24 volts across the control module internal fuse F3, which is located toward the middle of the con-
trol see Fig. 1 page 4. If necessary replace the fuse. See Serving Tips and Instructions, page 3, for accessing
the internal fuses of the control module.
• Check Item 6 in the INFO mode. If Item 6 shows a reading of 32, remove the air inlet tube from venturi on the
Blower/Burner Assembly. Looking into the inlet of the venturi, check for any rotation of the blower impeller. If
the blower impeller is rotating, replace the blower.
Prestige Control Module Display
10

11
Prestige Control Module Display
• If all the above steps fail to resolve the problem, replace the control module.
Boiler display shows a number of 1 to 8 for the first digit on the left followed by 2 or 3 dig-
its (boiler temperature)
- The boiler is in normal operating mode. Reference the boiler installation manual for detailed explanation of the boiler
operation.
Boiler Display shows FUSE
- Check and ensure the transformer is properly connected to the MCBA module.
• Check and ensure 24V are measured at the transformer when properly connected to the MCBA module. If nec-
essary, replace the transformer.
- Check the internal fuse F3 by locating the control module and removing the black housing. The internal fuse F3 is
located in the center of the control module as shown in Fig. 1 page 4.
See servicing tips and instructions, page 3, for accessing the internal fuses of the control module.
• If fuse F3 has blown, replace the fuse with a 4-amp/250V slow acting fuse. Check external boiler wiring for
external source of 24V backfeed.

If the primary boiler supply water temperature exceeds 200ºF, the burner will
shut down until the supply temperature drops below 200ºF. The boiler circula-
tor will continue operating.
• This problem should only occur if the heat load demand is less than
the low input-firing rate of the boiler, typically found on small single
heat zones and where there is a potential flow issue.
- Verify the boiler and heating system are filled with water and the
LWCO is operating properly.
- Ensure the boiler and heating system have been properly purged
and there is no entrapped air.
- Inspect and verify heating system piping and its components.
Ensure piping is per the recommendations given in the Prestige
Installation Manual or per other approved/recognized designed
configurations.
• Ensure system and/or zone circulators are operating properly
• Use a temperature-metering device to measure the supply water tem-
perature leaving the boiler. Compare this measured temperature with
the display temperature (INFO Mode display, “1” is the first digit on the
left followed by the temperature.)
- Replace the supply temperature sensor if the temperature com-
parison is largely varied by more than 10ºF.
If the primary boiler return water temperature exceeds 200ºF, the burner will
shut down until the return temperature drops below 200ºF. The boiler circula-
tor will continue operating.
• This problem rarely occurs unless the boiler experiences an Error
Code 18 and the system is charged with a water temperature in
excess of 200ºF
- Verify the boiler and heating system are filled with water and the
LWCO is operating properly.
- Ensure the boiler and heating system have been properly purged
and there is no entrapped air.
- Inspect and verify heating system piping and its components.
Ensure piping is per the recommendations given in the Prestige
Installation Manual or per other approved/recognized designed
configurations.
- Ensure the boiler piping is correct and the water flow is not
reversed or pipes are cross connected.
• Use a temperature-metering device to measure the return water tem-
perature entering the boiler. Compare this measured temperature with
the display temperature (INF Mode display, “2” is the first digit on the
left followed by the temperature.)
- Replace the return temperature sensor if the temperature com-
parison is largely varied by more than 10ºF.
Soft Lockout Error Code
12
High Temperature Limit,
Boiler Return
Code
High Temperature Limit,
Boiler Supply
b- 18
b- 19
Error Condition Correcting Error Condition
The boiler will display Soft Lockouts with a flashing “9”, then “b” as the first digit on the left of the display followed by a
steady two digit code. The boiler will automatically reset a Soft Lockout once the condition has been corrected and
returned to standard operating condition.

If the primary boiler return water temperature exceeds the boiler supply temper-
ature, the burner will shut down until the boiler return temperature drops below
the boiler supply temperature. The boiler circulator will continue operating.
• The following items should be checked:.
- Verify the boiler and heating system are filled with water and the
LWCO is operating properly.
- Ensure the boiler and heating system have been properly purged
and there is no entrapped air.
- Inspect and verify heating system piping and its components.
Ensure piping is per the recommendations given in the Prestige
Installation Manual or per other approved/recognized designed
configurations.
- Ensure the boiler piping is correct and the water flow is not
reversed or pipes are cross connected.
• Use a temperature-metering device to measure the supply water tem-
perature leaving the boiler. Compare this measured temperature with
the display temperature (INF Mode display, “1” is the first digit fol-
lowed by the temperature.)
- Replace the supply temperature sensor if the temperature com-
parison is largely varied by more than 10ºF.
• Use a temperature-metering device to measure the return water tem-
perature entering the boiler. Compare this measured temperature with
the display temperature (INF Mode display, “2” is the first digit fol-
lowed by the temperature.)
- Replace the return temperature sensor if the temperature compar-
ison is largely varied by more than 10ºF.
If the primary boiler supply water temperature rate of increase is deemed too
quick, the burner will shut down for a 3 minutes (MCBA 54) or 10 minute peri-
od (MCBA 14). If the condition is not corrected during the next cycle, the burn-
er shut down period of 10 minutes will increase an additional minute. The boil-
er will continue for 5 cycles until a “hard” lockout will occur.
• This problem will occur if the flow rate on the boiler is too low or if there
is no flow. Check for the following conditions:
- Verify the boiler and heating system are filled with water and the
LWCO is operating properly.
- Ensure the boiler and heating system have been properly purged
and there is no entrapped air.
- Inspect and verify heating system piping and its components.
Ensure piping is per the recommendations given in the Installation
Manual or per other approved/recognized designed configurations.
• Verify pump is properly sized for the flow rate required based on the head
loss of the system. Reference the installation manual for pump curves and
boiler pressure drop. Consult the circulator manufacturer for additional
pump curve data or for assistance in sizing a circulator properly.
• Verify and ensure the boiler space heating CH circulator is operating
properly.
- Check and verify 120V at the circulator wiring in the circulator junc-
tion box. If no voltage is measured, check circulator wiring and
connections.
Soft Lockout Error Code
13
Code Error Condition Correcting Error Condition
High Temperature Limit,
Boiler Supply and Return
b- 24
High Temperature Limit,
Boiler Supply
b- 25

- Check and verify 120V at the 120V terminal strip along terminals
1 and 2 inside the boiler enclosure. Check circulator wire harness
from the boiler to the circulator if necessary.
• Verify and ensure the external DHW circulator is operating properly.
- Check and verify 120V at the circulator wiring in the circulator
junction box. If no voltage is measured, check circulator wiring
and connections.
- Check and verify 120V at the 120V terminal strip, terminals 4 and
5 inside the boiler enclosure. Check circulator wire harness from
the boiler to the circulator if necessary.
If the LWCO device is determined to be open by the control module the boil-
er will remain in a shut down mode until the condition is corrected. Once the
condition is corrected the boiler will remain in the shut down mode for an
additional 150 seconds before startup.
- Check the pressure gauge on the boiler and ensure the system is
at minimum 10 psig.
- Ensure proper operation of the boiler make up system and fill
valve.
• Check continuity across the LWCO terminals for closed contacts if the
boiler system pressure gauge reads 10 psig or greater.
- Replace the LWCO device if the continuity shows an open circuit
and the system pressure is 10 psig or greater.
- Check the wiring and contacts from the LWCO to the control mod-
ule terminals if the continuity check shows a close circuit.
Will occur if during the ignition sequence the blower does not start. The boiler
display will indicate a status code of 5 during the ignition sequence.
• Disconnect the connector at the blower. Restart the boiler sequence
and check for 35Vdc at the connector between the black and white
wires (pin 1 & 5).
- If 35Vdc is present at the connector, reconnect the wire harness
to the blower and ensure a secure connection. Replace the blow-
er assembly if problem is not resolved.
- If 35Vdc is not present at the connector, inspect the wiring har-
ness. Replace the wire harness, if there is any damage visible
• Contact Triangle Tube Technical Support if problem is not resolved.
The control module is detecting the blower in operation when it should not be.
• Check and verify the wiring from the blower to the control module is
correct as shown in the appliance wiring schematic, page 29 and 30.
• Contact Triangle Tube Technical Support if problem is not resolved.
Soft Lockout Error Code
14
Code Error Condition Correcting Error Condition
LWC Device
b- 26
Blower Assembly
b- 28
b- 25 High Temperature Limit,
Boiler Supply (continued)
Blower Assembly
b- 29

If the primary boiler water temperature differential between the supply and the
return is too high (greater than 72ºF), the burner will shut down for a 180 sec-
onds (MCBA 54) or 150 second (MCBA 14) period. The circulator will con-
tinue circulating until the start of the next cycle. If the condition is not cor-
rected during the next cycle, the burner shut down period of 150 seconds will
increase an additional minute. The boiler will continue for 15 cycles (MCBA
54) or 20 (MCBA 14) cycles until a “hard “ lockout will occur.
• This problem will occur if the flow rate and demand on the boiler is too
low. Check for the following conditions:
- Verify the boiler and heating system are filled with water and the
LWCO is operating properly.
- Ensure the boiler and heating system have been properly purged
and there is no entrapped air.
- Inspect and verify heating system piping and its components.
Ensure piping is per the recommendations given in the Installation
Manual or per other approved/recognized designed configurations.
- Ensure the piping system pressure drop is within the flow rate
parameters of the circulator.
• Verify and ensure the boiler space heating CH circulator is operating
properly.
- Check and verify 120V at the circulator wiring in the circulator
junction box. If no voltage is measured, check circulator wiring
and connections.
- Check and verify 120V at the 120V Terminal strip terminals 1 and
2 inside the boiler enclosure. Check circulator wire harness if
voltage is measured at the control module.
• Verify and ensure the external DHW circulator is operating properly.
- Check and verify 120V at the circulator wiring in the circulator
junction box. If no voltage is measured, check circulator wiring
and connections.
- Check and verify 120V at the 120V terminal strip between termi-
nals 4 and 5 inside the boiler enclosure. Check circulator wire
harness and replace if needed if voltage is measured at the con-
trol module.
The control module detects a short or jumped out condition of the indirect
water heater temperature sensor. The burner will remain off until the condition
is corrected.
• Review parameter setting for DWH operating signal selection.
Reference Prestige Control Supplement for proper selection.
• Inspect the DHW temperature sensor and wiring, ensure it is secure
and in good condition.
- Replace the sensor if problem persists.
The control module detects a short or jumped out condition of the flue tem-
perature sensor. This code will also appear briefly prior to a “hard” lockout if
the flue gas temperature exceeds 250ºF. The burner will remain off until the
condition is corrected.
• Inspect the flue temperature sensor and wiring, ensure it is secure
and in good condition.
Soft Lockout Error Code
Code Error Condition Correcting Error Condition
Indirect Water Heater
Temperature Sensor
b- 33
b- 30 High Temperature Limit,
Boiler Supply and Return
Temperature Differential is
greater than 72ºF
15
Flue Temperature Sensor
b- 35

Soft Lockout Error Code
Flue Temperature Sensor
b- 40
Blower Assembly
b- 65
Code Error Condition Correcting Error Condition
The control module detects the indirect water heater temperature sensor as
“open” which is typically an improper or missing connection of the sensor.
- Review parameter setting for DHW operating signal selection.
Reference Prestige Control Supplement for proper selection.
• Inspect the DHW temperature sensor and wiring, ensure it is secure
and in good condition.
- Replace the sensor if problem persists.
The control module detects the flue temperature sensor as “open”, which is
typically an improper or missing connection at the sensor.
• Inspect the flue temperature sensor and wiring, ensure it is secure and
in good condition.
- Replace the sensor if problem persists.
The control module detects the flue temperature greater than 241ºF, less than
250ºF. Burner off for 150 seconds.
• This is an indication the heat exchanger flue ways may need cleaning.
Reference the Maintenance section of the installation manual for pro-
cedures on cleaning the flue side of the heat exchanger.
• Isolate the boiler from the boiler system piping and drain the boiler
heat exchanger. Flush the boiler heat exchanger several times, check-
ing the discharge water for signs of scale or sediment.
• Inspect the flue temperature sensor and wiring, ensure it is secure and
in good condition, replace as needed.
- Replace the sensor if problem persists.
The control module does not detect proper blower operation during a call for
heat.
• Disconnect the 35Vdc connector at the blower. Restart the boiler
sequence and check for 35Vdc at the connector between the black
and white wires (pin 1 & 5).
- If 35Vdc is present at the connector, reconnect the wire harness
to the blower and ensure a secure connection. Replace the blow-
er assembly if problem is not resolved.
- If 35Vdc is not present at the connector, inspect the wiring har-
ness. Replace the wire harness if the inspection reveals any signs
of damage.
- Contact Triangle Tube Technical Support if problem is not resolved
The control module requires an incoming voltage of 120V and a frequency of 60 Hz.
• If the incoming voltage is being supplied by a generator or alternative
source, check the frequency supplied and adjust accordingly.
- Contact Triangle Tube Technical Support for further assistance.
Flue Temperature Sensor
b- 52
Indirect Water Heater
Temperature Sensor
b- 38
Incoming Voltage
Frequency
b- 116
Flame Current Signal Lost
b- 118
16

If the LWCO device is determined to be open by the control module the boil-
er will remain in a shut down mode until the condition is corrected. Once
the condition is corrected the boiler will remain in the shut down mode for an
additional 150 seconds before startup.
- Check the pressure gauge on the boiler and ensure the system is
at minimum 10 psig.
- Ensure proper operation of the boiler make up system and fill
valve.
• Check continuity across the LWCO terminals for closed contacts if the
boiler system pressure gauge reads 10 psig or greater.
- Replace the LWCO device if the continuity shows an open circuit
and the system pressure is 10 psig or greater.
- Check the wiring and contacts from the LWCO to the control mod-
ule terminals if the continuity check shows a close circuit.
Code Error Condition Correcting Error Condition
LWC Device
b- 119
17
Soft Lockout Error Code

This error will occur if the control module detect a burner flame (flame signal)
prior to the ignition sequence.
• This problem maybe related to the burner operating too hot due to
poor combustion. The flame pattern and combustion should be tested
at both high fire and low fire inputs. Reference page 5 regarding high
and low fire input procedures. Reference page 27 for combustion
requirements.
- If the application is propane, check and verify the propane orifice
for proper size (reference page 27 for orifice sizes). Ensure the
propane orifice is properly seated in the gas valve gasket.
• Inspect the burner head through the burner sight port during shut
down sequence of the boiler.
- If the flame remains after the shut down sequence, the gas valve
maybe leaking. Check and verify the gas pressure is less than 13
inches w.c. If the gas pressure is less than 13 inches w.c.,
replace the gas valve.
This error will occur if the boiler has failed to establish flame detection during
the ignition sequence. The lockout will occur after 5 tries.
• If no ignition spark occurs during the ignition sequence:
- Check the ignition electrode cable, the electrode boot connector
and all connections, ensure all are in good condition and tightly
secure. Replace cable if damaged.
- Inspect the insulation of the electrode cable and the electrode
igniter; ensure there is no damage. Replace cable or igniter as
needed.
- Check the ground lead for a secure connection from the control
module ground to the burner mounting plate. Use a ground con-
tinuity check to verify a good ground.
• If there is an ignition spark during the ignition sequence, but no flame:
- Verify the manual shutoff valve on the gas supply piping is in the
OPEN position.
- Check and verify the gas pressure at the inlet of the valve during
ignition sequence. Ensure the gas pressure maintains a minimum
5 inches w.c during ignition sequence. Note: All gas appliances
within the building should be operating during this measurement.
- Check and verify all gas piping is free of obstructions and has
been purged of all air.
- Check the gas meter for indications of gas flow during the ignition
sequence.
- Remove the ignition electrode to inspect for damage. Clean any
white oxides off the electrode if necessary. Replace the electrode
if damaged or will not clean.
- Replace the gas valve rectifier cable.
- Remove and inspect the gas valve and venturi gas ports. Ensure
ports are free of obstructions.
- If the above items have been completed and verified, Triangle
Tube Technical Support for additional assistance.
Hard Lockout Error Code
Code Error Condition Correcting Error Condition
The boiler will display a Hard Lockout with an Eas the first digit on the left of display followed by an error code. The
boiler must be manually reset by pressing the RESET button on the display once the condition has been corrected. A
Hard Lockout will occur when boiler conditions, that are considered critical in terms of safety, are not met or exceeded.
Flame Detection Error
E- 00
Failed Ignition Error
E- 02
18