Hach WDMP sc, User Manual, Page: 20 / 74

6.2 Panel maintenence
6.2.1 Look for leaks and blockages
Examine the components in the list for leaks and blockages:
• Inlet and drain tubing
• Sample flow valve
• O-ring seal on the probes
• Fittings, elbows and couplers
6.2.2 Clean the panel
N O T I C E
Do not use solvents or a pressurized hose to clean the panel.
1. Use a mild detergent to wash the surface of the panel.
2. Use a slightly damp cloth to clean the surface of the panel.
6.2.3 Replace the junction box fuses
D A N G E R
Electrocution hazard. Remove the instrument from the mains power to change the fuses. Disconnect
the power cord or turn off the breaker at the panel.
D A N G E R
Fire hazard. Use the same type and current rating to replace fuses.
To replace the fuses, remove the controller and open the junction box. Refer to Wiring for power—
Junction box on page 12, Figure 7 on page 14 and Figure 12 .
20 English