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Alarms and Troubleshooting
Table 16.
LED flash code keys for two stage heat module UTEC 1171-63 Ignition Board (continued)
LED Code
System
5 Flashes
Lockout
6 Flashes
No Flame
7 Flashes
No Flame
8 Flashes
Lockout
9 Flashes
Lockout
VFD Programming Parameters
TR150 VFD
Units shipped with TR150 variable frequency drives (VFD) are
preset and run tested at the factory. If a problem with a TR150
VFD occurs, ensure that the programmed parameters listed in
Table 17
have been set before replacing the drive. Refer to
Figure 145
for TR150 VFD display layout.
Figure 145. TR150 VFD display
102
Troubleshooting Guide for UTEC 1171-63 Two Stage Board
Fault Description
Burners light and then drop out resulting
in too many flame failures.
Inducer fan is running on high speed,
burners are OFF, high limit is open.
Rollout switch has tripped open.
Flame is present without any call for
heat.
Exceeded max limit trips in one call for
heat.
Action
Lockout from too many flame losses.
1. Check flame sensor ceramic is not cracked; check flame rod for being
coated with debris and oil.
2. Check flame sensor wire is connected correctly; not cracked, no abrasions
and not covered with debris.
3. Check for recirculation of exhaust gases.
4. Check flame stability and proper location from sensor.
5. Check that pressure switch is not dropping out due to loss of pressure.
High temperature switch open.
1. Check temperature rise and airflow over the heat exchanger.
2. If high limit does not reset, change high limit switch.
Rollout switch open.
1. Check for blockages in exhaust vent assembly.
2. Check for air leaks inside the burner compartment.
3. Reset the rollout switch and observe flame for any signs of rollout.
Flame present with gas OFF.
1. Verify there is no voltage to the gas valve.
2. Check gas line pressure making sure it is not higher than allowed by gas
valve manufacturer.
3. If valve is not energized, check for gas flow. If gas is flowing, replace gas
valve; verify line and manifold gas pressure are correct.
Exceeded max limit trips in one call for heat (5).
1
Parameter number and name.
2
Parameter value
Set-up number shows the active set-up and the edit setup. If the same set-
up acts as both active and edit set-up, only that set-up number is shown
3
(factory setting). When active and edit set-up differ, both numbers are
shown in the display (set-up 12). The number lashing, indicates the edit set-
up.
Motor direction is shown to the bottom left of the display-indicated by a
4
small arrow painting either clockwise or counterclockwise.
5
The triangle indicates if the keypad is in status, quick menu or main menu.
6
Com LED: Flashes when bus communication is communicating.
7
Green LED/On: Control section is working.
8
Yellow LED/War: Indicates a warning.
9
Flashing Red LED/Alarm: Indicates an alarm.
10 [Back]: For moving to the previous step or layer in the navigation structure.
: For maneuvering between parameter groups, parameters
11
and within parameters. Can also be used for setting local
reference.
[OK]: For selecting a parameter and for accepting changes to parameter
12
settings.
[Hand On]: Starts the motor and enables control of the frequency converter
via the keypad.
13
NOTICE: Terminal 27 Digital Input (5-12 Terminal 27 Digital Input) has coast
inverse as default setting. This means that [Hand On) does not start the
motor if there is no 24 V to terminal 27. Connect terminal 12 to terminal 27.
14 [Off/Reset]: Stops the motor (Off). If in alarm made, the alarm is reset.
[Auto On]: Frequency converter is controlled either via control terminals or
15
serial communication.
OAU-SVX007A-EN
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