Navien NCB-150E, Руководство по обслуживанию

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Version 1.4 84 NCB-E Service Manual
Error Code Sub Code Function Self-diagnostic/Action
E109 0 Abnormal fan motor activity
●
Check and clean the intake air filter.
●
Verify proper voltage from PCB.
●
Check and clean the fan motor.
E110
1 Exhaust blockage (checking the FAN)
●
Check the intake/exhaust/condensate drain pipe for
obstructions.(ice, snow, wildlife, etc)
2 Exhaust blockage (Using hot water)
●
Check and clean the intake air filter
3 Exhaust blockage (using space heating)
●
As a temporarily solution for troubleshooting purposes,
restart the unit and/or remove the front cover.
E205
1 Abnormal Heating supply thermistor (Open)
●
Check the thermistor. (Connector, Wire, Resistance of
sensor)
●
Check the Pump operation
●
Replace the thermistor.
2 Abnormal Heating supply thermistor (Short)
E218
1 Abnormal Heating return thermistor (Open)
●
Check the thermistor. (Connector, Wire)
●
Check thermistor voltage from PCB and resistance values.
●
Replace the thermistor.
2 Abnormal Heating return thermistor (Short)
E351 0 Abnormal Auto feeder valve (make-up water)
●
Check the auto feeder valve
E352 1 Abnormal Cold water inlet2: thermistor (Open)
●
Check the auto feeder valve
●
Check incoming water pressure and any activity at PRV.
E353
1 Abnormal water pressure sensor (Open)
●
Check the water pressure sensor.
2 Abnormal water pressure sensor (Short)
E407
1 Abnormal Hot water outlet: thermistor (Open)
●
Check the thermistor. (Connector, Wire, Resistance of
sensor)
●
Check the Pump operation
●
Replace the thermistor."
2 Abnormal Hot water outlet: thermistor (Open)
E421
1 Abnormal Cold water inlet: thermistor(Open)
●
Check the thermistor. (Connector, Wire)
●
Check thermistor voltage from PCB and resistance values.
●
Replace the thermistor.
2 Abnormal Cold water inlet: thermistor(Short)
E515
1-2, 10 Abnormal monitoring device of PCB
●
Check the PCB connection.
●
Reset the PCB power.
3-4
Abnormal communication between PCB and
Gas V/V
●
Check the connection between PCB and Gas V/V
●
Check the Resistance of Gas V/V
5-7 N/A N/A
8
Abnormal communication between PCB and
Ignitor
●
Check the PCB connection
●
Check the Ignitor
9
Abnormal communication between PCB and
FAN
●
Check the PCB connection
●
Check the Fan
11-12
Abnormal communication between PCB and
Dual Venturi
●
Check the PCB connection
●
Check the Dual Venturi
E517 0 Abnormal dip switch setting
●
Check the dip switches on the front panel and PCB.
E594 0 Abnormal EEPROM of PCB
●
Check the PCB.