TROUBLESHOOTING
41
8 – Leave unit recirculating for 4-6 hours.
9 – After sanitization period, disconnect 0.22 m dispense filter and tank level sensor, if it was not
disconnected in point 2. Dispense part of the liquid. If the tank is equipped with tank pump,
dispense other half of the liquid using it.
10 – Connect tank level sensor fill in the tank partially. Disconnect the tank level sensor and let the
unit recirculate for an hour.
11 – Drain water and repeat point 10. one more time.
12 – Drain water, connect polishing cartridge and 0.22 m dispense filter.
13 – Proceed working with unit as described in manual.
Clean the exterior of the system with soft tissue and water. Do not use any chemicals.
TROUBLESHOOTING
Q-Front N system is switching from „Filling
Tank” mode to „Low Pressure” and back Prefilters are clogged and need to be replaced
Polishing Q (part no. 10031) module needs to be
Error 5 Pre-filter Q (part no. 10411) needs to be replaced
Conductivity reading is “….”
Conductivity sensor is empty (not filled with
water).
Operation dongle is not connected
Conductivity reading is in the 1.0 – 1.5 µS/cm
range and does not change.
Validation dongle is connected instead of
operation dongle
Resistivity reading is in the 0.6 – 0.9 MOhm*cm
range and does not change.
Validation dongle is connected instead of
Temperature reading is “--.-“
Temperature sensor is not connected or it is
damaged
TOC has not been measured yet.
Wait approx. 1 hour until at least one
recirculation cycle completes and TOC
Beeping sound during Filling Tank mode
UV sterilization bulb (part no. 10011) needs to be
replaced
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