Name: Nibe VVM 320
Brand: Nibe
Rating: 5 (1 reviews)

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Troubleshooting guide

Alarm 1 - sensor fault

Is the actual sensor correctly

connected?

YES

Are the characteristics for the

sensor OK, measured from any

external joint in the sensor cable?

(See "Data for temperature

sensor" section.)

Is any external joint in the sensor

cable correctly connected?

Defective sensor. Replace.

Action.

Are the characteristics for the

sensor OK, measured from

connected sensor cable on the

input card (AA3)?JSH (See "Data

for temperature sensor" section.)

Action.

Check wiring and switches.

Is the output voltage from the card

correct? (See "Data for

temperature sensor" section.)

Defective input circuit board

(AA3). Replace.

YES

Check wiring and switches.

YES

49Chapter 6 | TroubleshootingNIBE™ VVM 320

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