NTI INSTALLATION MANUALS

Part 13 - Troubleshooting

Display Error code

Possible cause based on priority

Error Type

Error Description

Possible Remedies

Blocking (Manual Reset)

Control versions prior to 00.85.00

Reset the error by tapping the reset button. Check menu 8.5.5. if the software version is 00.44.03 or 00.44.01 replace the PCB.

1 07

Controller Software problem

Raise the system pressure, with the boiler and heating circulators o , to a minimum of 20PSI.

Water Pressure too low

Air in the system / lack of water pressure

Ensure boiler is free of air and pressurized to at least 20PSI

Ensure there are no pumps or check valves in the hot water or heating system piping unless they are shown in the installation manual. Ensure the expansion tank is in the correct location according to the piping diagram in the manual. If the system is lled to at least 20 PSI and the problem persists test the pressure switch wires for continuity and good connections, replace the pressure switch. Check for proper ow during heating an hot water demands, when the piping is clear the boiler can maintain a delta of 40F or lower at full re. A higher delta T indicates a lack of water ow. Ensure the supply sensor (near the top of the heat exchanger) is connected to the two red wires and it securely clipped on the outlet pipe. Check the supply sensor for water damage, try swapping the supply and return temperature sensors. Check sensor resistance see temperature/ resistance chart. Inspect the wiring between the supply sensor and PCB, check for continuity, corrosion and water damage, ensure connectors are plugged in properly Ensure the return sensor (near the bottom of the heat exchanger) is connected to the two blue wires and it securely clipped on the outlet pipe. Check the return sensor for water damage, try swapping the supply and return temperature sensors. Check sensor resistance see temperature/ resistance chart. Inspect the wiring between the return sensor and PCB, check for continuity, corrosion and water damage, ensure connectors are plugged in properly If not using outdoor reset, ensure Menu 4.2.1, 5.2.1 and 6.2.1 are set to 0. If using Wi-Fi the boiler gets the outdoor temperature from the web. The website may be down or the WIFI has become disconnected In a cascade the system sensor must be connected to the master boiler, connect the system sensor to the master boiler using the SYS plug connection. If the boiler is set to work in a cascade the system sensor must be connected to the master boiler. If not running in a cascade set parameter 0.4.6 to b-Sin. Check the system sensor for water damage and disconnected wiring . Check sensor resistance see temperature/ resistance chart. Ensure the system sensor is connected to the master boiler.

Improper boiler piping

Blocking (Auto Reset)

Improper expansion tank location

1 08

Water pressure too low.

Malfunctioning pressure switch or bad wire harness

Blocked plate exchanger or return lter

Temperature sensor disconnected

Blocking (Auto Reset)

Supply sensor short circuit or open circuit

Faulty Temperature Sensor

1 10

Damaged sensor wiring

Temperature sensor disconnected

Blocking (Auto Reset)

CH Return temp. sensor circuit open / short circuit

Faulty Temperature Sensor

1 12

Damaged sensor wiring

Outdoor reset turned on (but not used)

Blocking (Auto Reset)

Outdoor sensor not con nected

1 14

WIFI disconnected

System sensor disconnected

Menu 0.46 improperly set

115

System sensor Disconnected

Faulty Temperature Sensor or wiring

92