Lockout And Error Code Descriptions; Fill – Low Water Pressure; Blocking Error Navigation - NTI Trinity TX51 Installation And Operation Instructions Manual

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Display Menu Guide
Err – indicates the
boiler has a blocking
error.
Installer Menu – press
and hold MENU and
OK buttons to view
settings.
Fill – Low Water Pressure
The Tx boiler is equipped with a water pressure sensor located in the return piping inside the boiler cabinet, see
Figure 19-1(e), item 24 for sensor location; the reading from the sensor is displayed on the Main Screen, see
Figure 17-2. If the control senses a pressure below 7 PSI, burner operation is inhibited and "FILL" is displayed
on the screen, see Figure 17-8. As long as the water pressure is above 3 PSI the circulators will be permitted to
operate; otherwise they are only operated 5 seconds every minute.
Water Pressure
Table 17-3 Lockout and Error Code Descriptions
Code Description
Ignition Error – three unsuccessful ignition attempts in a row; perform the following checks:
Loc 1
1. Check venting for blockages.
2. Check condensate trap from proper draining.
Static gas pressure – if insufficient check gas supply-lines and regulator.
3.
4. Gas pressure during ignition – if the static gas pressure is sufficient, check pressure during ignition
sequence, i.e. when gas valve opens.
a. If pressure drops below minimum (4" for NG / 8" for LP), check gas supply-line and regulator.
b. If pressure does not move, verify 120VDC at valve during ignition; if no power, check wiring
c. If pressure drops slightly – proceed to next step
Unit ignites but immediately goes out – check flame sensor (clean or replace) and flame sensor
5.
cable, clean combustion chamber, replace control. If a combustion analyzer is available, adjust
throttle screw out 1 turn – check/adjust combustion once unit is operational.
Unit fails to ignite – check spark electrode and cable (replace). Verify the spark electrode is
6.
arcing. WARNING!! – maintain clearance from ignition components while the power is on to
avoid risk of severe electrical shock.
Unit ignites and runs – check combustion at maximum and minimum modulation rates.
7.
70
Figure 17-7 Blocking Error Navigation
Figure 17-8 Fill – Low Water Pressure
– replace control; if power is present – replace gas valve.
Tx I&O Manual
Error code - see Table
17-3 for description.
User Menu – press the
UP or Down button to
view boiler parameters.
FILL – indicates the
water pressure is too
low.