6.7.3 Replacing unit fuses
Warning Danger of death!Beforereplacingtheunitfusethesteamhumidiermust be switched
off and secured against unintentional reconnection asdescribedinchapter6.3.Takecare
thattheelectricitysupplytothemaincontactorisdisconnected(checkwithvoltagetester).
Warning! Electronic components are very sensitive to electrostatic discharge. To protect these
components,measuresmustbetakenagainstdamagefromelectrostaticdischargewhenreplac-
ingtheunitfuse(ESDprotection).
Theunitfusesmayonlybereplacedbytrainedandqualiedpersonnel.
Important!Iftheunitfuseblowsthisisgenerallyduetoafaultyunitcomponent.Thereforeyoushould
checkthesecomponentsbeforereplacingthefuse(seetablebelow).
Onlyusethecorrecttypeoffuseaccordingtothefollowingtable.
Warning! It is not permitted to use repaired fuses.
Power board (F1..F3, F1...F6 or F1...F9)
Supply module (F2)
Supply module (F1)
Control board (F5)
Fuse Specication Before replacing, check
F1 on supply module
F2 on supply module
6.3 A, slow-acting
1 A, quick-acting
Drainpump(blockedorcoilfaulty)
Inletvalve(blockedorcoilfaulty)
F5 on control board 50 mA, quick-acting Control signal
F1…F3 on power board
(Mk5 Visual/Process 5-.. and 8-..)
F1…F9 on power board
(all other models)
16 A, super quick-acting
20 A, super quick-acting
Heating elements (on short-circuit)
Heating elements (on short-circuit)
6.7.4 Resetting fault indication “Error”
Inordertoreturnthesteamhumidiertooperationafterfaultelimination,thesteamhumidiermustbe
switchedoffforapprox.5secondsandthenswitchedonagain.