Nortec NHDI User Manual

Page 27

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Malfunction / Indication

Cause

Remedy

Invalid level

Error code: 6A/6B

Level unit faulty.

Magnetic field in vicinity of level unit.

Replace level unit.

Eliminate magnetic field.

Steam pressure (error only)

Error code: 7A/7B

Steam hose blocked or restricted
(water trap).

Pressure balance adapter into steam
connection fitting blocked.

Duct pressure too high (>1500 Pa).

Inspect steam hose, clean if
necessary and install correctly.

Remove adapter and clean opening
with a needle.

Inspect ventilation settings.

External safety chain interrupted

Error code: none

Ventilator lock open.

Automatic flow control has
responded.

Safties are open.

Switch on ventilator/ventilation
system.

Inspect ventilator/filter of ventilation
system.

Servicing, inspect system if
necessary.

Main failure on Unit B.

Inspect voltage supply to Unit B.

Alarm 6A

level indicat

Error 6B

level indicat

Alarm 7A

communication

safety chain

external A

mains failure

B

LEGEND

A = Circuit 1

B= Circuit 2 (double unit 2nd

cylinder)

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