Ti Series Installation and Operation Instructions
│
Trinity
47
ER9
Internal Controller Fault
Indicates that the Sentry control has lost communication with an internal
processor, contact NTI for assistance.
ASO
Indicates that
the Air
Switch is
Open
“Air Switch Open”
This is displayed when the
boiler is expecting the air
switch to be closed by a
differential pressure generated
when the combustion blower
turns on.
1.
Are the vinyl tubes connected between the air switch and the ports on
the inlet pipe? Negative side of switch connects to the port on the 1-
1/2” PVC elbow.
2.
Check for blockage on the intake and exhaust vents.
3.
If fan is running the air switch may be faulty, ensure it is set at 0.2”wc.
4.
If fan is not running, check 120V wiring to blower, if ok remove low
voltage harness from blower, if blower fails to start, replace blower, if
blower does start problem may be with blower or Sentry control.
ASC
Indicates that
the Air
Switch is
Closed
“Air Switch Closed”
This is displayed when the
boiler has turned the blower
off and is expecting the air
switch to be open.
1.
Is the fan running. If so check for 24V between B and D terminals (see
wiring diagram). If 24V is not present replace transformer.
2.
If fan is not running then the Air Switch is stuck closed.
a.
Check to ensure switch is set at 0.2”wc.
b.
Check vinyl tubes to air switch for moisture, clear if necessary
and check venting termination for proper clearance (moisture in
tubes is generally cause by cross-contamination of the exhaust
to the air inlet).
c.
Remove the white wire from the air switch, if ASC persists
replace the Sentry 2100 controller, if an ASO message is
display replace the air switch.
Two Flashes
on Fenwal
“Flame Fault”
The Fenwal controller senses
flame prior to ignition
sequence.
If the combustion sequence is normal, and there is no flame prior to ignition,
the Fenwal control is defective, and must be replaced.
Three Flashes
on Fenwal
“Ignition Lockout”
Check the condensate drain for blockage – a blocked condensate drain will
flood the combustion chamber and cause this error, see Section 5.0 for
further instructions.
Reset and observe ignition sequence:
1.
If the burner ignites then goes out within 2-3 seconds:
a.
If the boiler is newly installed, check the polarity of the
120VAC power supply – reversed polarity will cause this error.
b.
Ensure the cable is connected to the flame sensor.
c.
Check for proper sustained gas line pressure.
d.
Check venting and combustion chamber for blockage – clean
combustion chamber.
e.
Replace flame probe.
f.
Replace Fenwal controller.
2.
If the igniter glows but the burner does not ignite:
a.
Check for proper sustained gas line pressure.
b.
Check venting and combustion chamber for blockage – clean
combustion chamber.
c.
Replace igniter.
d.
Replace Fenwal controller.
3.
If the igniter does not glow:
a.
Replace igniter.
b.
Replace Fenwal controller.
Boiler will
not stay lit
.
Indicates lack of a flame
signal. In order to stay
running the flame signal must
be at least 0.7 µAmps
1.
If the Burner light on the Sentry is going out, go to “
Burner shutting
off
”.
2.
Check the condensate drain for blockage – a blocked condensate drain
will flood the combustion chamber and cause this error, see Section 5.0
for further instructions.
3.
See Step 1 (a through f) under “Three Flashes on Fenwal”.
Boiler bangs
or hisses
Bangs or sounds like a kettle
while burner is running
indicates insufficient flow
1.
Ensure the plumbing is installed as per this manual. Check to see if
pumps are operating properly and water pressure is above 15psi.
This
problem can lead to boiler overheating!
See Section 9.0.
2.
Boiler may be plugging-up with scale or magnetite, clean with Fernox
DS-40 Descaler and Cleaner (NTI PN: 83450).
3.
If glycol is being used the concentration may be to high, recommend
using a concentration lower then 35%. De-rate unit by reducing the
maximum modulation rate (HFS) and/or the maximum water
temperature (LO and HI), see Section 12.0.
