NTI Trinity Lx 150, Инструкция по установке и эксплуатации

Страница: 83 / 104

Lx Series Installation and Operation Instructions
│
Trinity Lx
83
Table 17-1 Troubleshooting Chart
PROBLEM POSSIBLE CAUSE CORRECTIVE ACTION
Hold 63 – LCI OFF (Limit
control input) Replacement control incorrectly
configured.
LCI must be set to “enable” on all Lx models,
excluding Lx150/150E units with a serial number
of 49351 or lower and Lx200/400 units with a
serial number of 48251 or lower. See instructions
included with replacement controller.
Lockout or Hold 65 –
Interrupted Air Switch OFF
No problem, normal operation Hold 65 will normally be displayed momentarily
during the drive to light-off.
Blown fuse
Check Fuse
"
A
"
, blown fuse prevents blower
from operating.
Faulty blower
If Fuse “A” is good and blower remains off, check
120VAC supply to blower, if present replace
blower. If blower is on proceed to next step.
Blocked venting Check for blockage of the exhaust vent.
Blocked air inlet Check for blockage of the air inlet.
Disconnected, damaged or blocked
tubing Inspect the clear vinyl tubing connecting the air
and – ports to the air metering elbow.
Condensation or other foreign matter may be
obstructing the tubing, preventing the switch from
sensing differential pressure caused by air flow
through the metering elbow.
Incorrect air switch setting Contact NTI technical support.
Faulty air proving switch If venting and air inlet are clear, temporarily
jumper the air switch. If the unit lights and
operates smoothly – replace air switch. If the unit
fails to light or lights but runs rough or abruptly
shuts down – check boiler internals for blockage.
WARNING Only jumper the air switch for
diagnosing purposes.
Tripped High Vent Pressure Switch
(Lx300-400 only) The high vent pressure switch will trip when the
combustion chamber is blocked. Clean
combustion chamber and reset switch.
Tripped Thermal Fuse
(Lx300-400 only) Check Thermal Fuse on the back of the heat
exchanger (accessed from the rear of the cabinet).
If tripped contact NTI.
Tripped Door Reset Safety Switch
(Lx300-800 only) The Door Reset Safety Switch will trip with the
combustion chamber gets dirty or the door
insulation fails. Clean the combustion chamber,
inspect the door insulation and reset the switch.
Incorrect air switch wiring Check that the red and orange wires are connected
to quick connect tabs 3 and 1 respectively.
Hold 66 – Interrupted air
switch ON (and blower is off) Incorrect air switch setting Contact NTI technical support.
Incorrect air switch wiring Check that the red and orange wires are connected
to quick connect tabs 3 and 1 respectively.
Faulty air switch Disconnect red and orange wires from air switch
and check for open circuit between terminals 1 &
3. If continuity detected, replace air switch.
Hold 66 – Interrupted air
switch ON (and blower is on) - Blower problem
- Faulty controller Check low voltage wiring from blower to
controller. Check VDC signal from red–green
and black-green; if not 28-32VDC and 0 VDC
respectfully – replace controller. If signal is
correct – replace blower.