NTI INSTALLATION MANUALS

Part 13 - Troubleshooting

Display Error code

Possible cause based on priority

Error Type

Error Description

Possible Remedies

Detected accessory wired to BUS connection Detected accessory wired to BUS connection

Restore the factory default menu 2.8.0. If the error persist replace the PCB. Restore the factory default menu 2.8.0. If the error persist replace the PCB.

4 30

Warning

4 31

Warning

Single boiler con gured as a follower

If this is a stand alone boiler turn 0.46 to B-SIN.

Warning (Manual Reset)

Inspect EBUS wiring for damage or shorts, EBUS wiring is polarity sensitive. CN24 pin 11 and 12.

Manager boiler missing from Bus

Manager boiler miswired

440

Manager boiler turned o

Ensure power is on for all boilers in cascade.

For Cascade manager set 0.46 to B-Mas, only one boiler in the cascade may be set to B-Mas (see cascade manual set-up).

Manager boiler not con - gured correctly Single boiler con gured as a Master

If this is a stand alone boiler turn 0.46 to B-SIN.

Inspect EBUS wiring for damage or shorts, EBUS wiring is polarity sensitive. CN24 pin 11 and 12.

Warning (Manual Reset)

Follower boiler miswired

Follower Boiler Missing from BUS Connection

4 41

Follower boiler turned o

Ensure power is on for all boilers in cascade.

Follower boiler not con gu red correctly

For follower boilers set 0.4.6 to FL-1 up to FL-7 (see cascade manual set-up).

Ignition and Detection

Test the Static gas pressure is must be 3.5-10.5" for natural gas and 8-13 for Propane. With the manometer connected test the gas pressure During ignition. If the pressure drops below 3.5" for natural gas or 8" for LP gas, there is a gas supply problem, check the gas line and gas regulator. Set 2.2.0 in accordance with "Table Summarizig Power" in Manual. This setting may be adjusted from 20-65 to achieve smooth ignition. Remove front cover and inspect the venturi and boiler air inlet silencer for debris. Reset the error and try again. Inspect exhaust for proper slope to boiler and possible restrictions or blockages. Inspect condensate drain, if the drain was clogged water may have entered the gas valve. If the valve was wet it must be replaced. Check conversion instructions, increase the gas ow by adjusting the input screw. **A combustion test must be performed if the gas valve is adjusted. Turn o boiler and the gas and remove the igniter, inspect it for cracks or warping the igniter gap is 3/16"-1/4". With the gas o and the igniter removed observe the spark during the trial for ignition ensure it sparks for 3-5 seconds. If there is no spark check that the spark transformer receives 120VAC during the ignition trial. Warning: the following must be performed by a quali ed technician with a combustion analyzer. Use the gas valve input screw to increase the gas ow. Once the boiler remains lit perform combustion test. If the boiler lights well and has a strong ame, replace the ame sensor and inspect the ame sensor harness for shorts or damage.

Improper Gas pressure

Improper light o rate setting

Blocked intake

Blocked Exhaust

Blocked condensate Drain

Blocking (Manual Reset)

No ame detected (3 times) No visible ame

5 01

Improper LP conversion

No Spark

Improper combustion settings

Faulty ame sensor

96