Nederman E-PAK 150 DX Instruction Manual

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Nederman E-PAK 150 DX Instruction Manual Manual pdf 40 page image

E-PAK 150 DX/300 DX/500 DXEN409.3.2 Fault signalsThe control panel has two fault indicator alarms, a red fault indicator light(bottom, right) and a yellow one (bottom, left), which will light up when a faultoccurs, see Figure 11.The following standard faults will cause the red fault indicator light to light up:• The motor overload relay has tripped.• The fan thermal switch, see Figure 5, item 6, has tripped.• The pressure switch, see Figure 5, item 8, above the control filter hastripped.• The explosion relief panel sensor has tripped.In addition, connected accessories, such as an external alarm input or a CAS,will also result in a red fault signal.The yellow fault indicator light signals an increased pressure drop over thecontrol filter. The unit will continue to operate, but we strongly recommendthat the reason for the fault is investigated. See Chapter 12 Troubleshooting tofind the cause of the alarm. See Chapter 10 Maintenance for replacement of thecontrol filter.NOTE! Continuous operation with the yellow fault indicator light lit mayresult in severely reduced performance and overheating of the side channel fan.9.3.3 Resetting fault signalsIf the red fault indicator light lights up, the cause of the fault is to beinvestigated. See Chapter 12 Troubleshooting for instructions on how toidentify the cause of the problem and which actions to take.To reset the control system, turn the standby and reset switch to position Reset.Restart the unit by turning the standby and reset switch to position 1.NOTE! If the cause of the fault is not eliminated, the unit will immediately goback to fault signal mode and stop.The yellow fault indicator light will be reset automatically once the controlfilter is replaced and the cause of the pressure drop over the control filter isremoved.10 MaintenanceWARNING! Risk of personal injuries.Use proper protective equipment when risking exposure to the dust.WARNING! Risk of electric shock.Work with electric equipment is to be carried out by a qualified electrician.WARNING! Risk of electric shock.Always disconnect the supply voltage with the maintenance switch before anyservice, whether mechanical or electrical. Always lock the maintenance switchin the off position.WARNING! Risk of personal injuries.Ensure that there is no vacuum present in the system during service.