8.2.1 Inspection contract
For all inspection and servicing work to be carried out at regular intervals we
recommend taking out the inspection contract offered by KSB. Contact your Service
Partner for details.
Checklist for commissioning/inspection and maintenance (⇨ Section 8.9 Page 50)
8.2.2 Measuring the insulation resistance of the motor
Measure the insulation resistance whenever performing maintenance work.
Measurements must be taken at the cable ends.
The measurements must be carried out using an insulation resistance measuring
device (hand-crank megger).
▪ Measuring voltage for three-phase units: 1000 V DC
▪ Measuring voltage for single-phase units: 500 V DC
The insulation resistance must not be less than 2 MΩ.
If this value is not reached, the motor or cable are damaged, and the motor must be
overhauled.
For this purpose always contact KSB's service centres.
8.2.3 Unblocking the cutter
mini-Compacta US, UZS
If the water level in the tank rises and the alert is triggered without the pump
starting up, the cutter may be blocked.
To unblock the cutter:
1.
Interrupt the power supply. (⇨ Section 5.6 Page 25)
2. Remove screw plug 903.01 at the motor housing. Use a socket wrench (WAF 8)
on the hex. head of the shaft end to turn the rotor to and fro until it turns
freely again.
3. Fit screw plug 903.01 with joint ring 411.01 again.
4. Perform start-up procedure. (⇨ Section 6.1.1 Page 27)
NOTE
If the blocked pump has been tripped by the thermal motor protection, it will be
operational again after approx. 15 minutes.
8.2.4 Oil check/Oil change
mini-Compacta US, UZS and variant C
1.
Remove the rotating assembly. (⇨ Section 8.3.4 Page 46)
2. Position the rotating assembly as shown.
Fig. 26: Draining the oil reservoir
Insulation resistance
≥ 2 MΩ
8 Servicing/Maintenance
mini-Compacta
43 of 86
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