Nilfisk-Advance CMAX 28/34ST Service Manual

Contents

Nilfisk-Advance CMAX 28/34ST Service Manual Manual pdf 61 page image

60 - FORM NO. 56043071 CMAX™ 28/34ST / I-MAX ™ 28/32C, BA 750/850ST, BA 750CELECTRICAL SYSTEMMAIN CONTROL BOARD SPECIAL PROGRAM OPTIONSRecall Display of the Main Control Board Software Revision Level:If it is desired to recall the machine’s (A1) main control board software level perform the following steps:1 Turn the master on/off key switch to the off position.2 Press and hold the scrub off/pressure-decrease and solution switches.3 While holding both switches turn the master on/off key switch to the on position.4 Continue to hold both switches until the hourmeter/status display shows a letter of the alphabet (example “b”) then release both switches.5 The letter displayed “b” represents to the service mechanic the control board’s revision level.6 Exit by turning the key switch to the off position.Selection of Low Voltage Cutout Threshold:FACTORY DEFAULT: StandardThe low voltage cutout feature will prevent over-discharging the batteries. This feature will automatically shut down the scrub system when thebattery voltage falls to the selected threshold. The cutout level is adjustable. The standard setting is 1.72 volts per cell and the alternate settingis 1.81 volts per cell. The standard setting should be used unless the battery manufacturer specifies the higher cutout voltage. It is important tonote that some maintenance free batteries (including some gelled electrolyte cells) are capable of being safely discharged down to 1.72 volts percell. To select between the two types:1 Turn the master on/off key switch to the off position.2 Press and hold the scrub off switch.3 While holding the scrub off switch turn the master on/off key switch to the on position.4 Continue to hold the scrub off switch until the scrub off indicator turns green and the hourmeter/status display shows “S” (standard) or “A”(alternate).5 Release the scrub off switch.6 Pressing and releasing the scrub off switch will now select between the two options. For standard wet cell batteries select “S” and for batteriesthat require the higher cutout voltage select “A”.7 To save the new setting, turn the master on/off key switch to the off position.8 The new setting will be saved and will remain in effect until it is changed again.Adjustment of Scrub Pressure Limit:FACTORY DEFAULT: 9 (MAXIMUM)The maximum scrub pressure setting is adjustable so that the scrub pressure can be limited to the desired level. The limit can be set anywherefrom 1 (minimum pressure) to 9 (maximum pressure). To adjust the scrub pressure limit:1 Turn the master on/off key switch to the off position.2 Press and hold the scrub-on/pressure-increase switch.3 While holding the scrub-on/pressure-increase switch turn the master on/off key switch to the on position.4 Continue to hold the scrub-on/pressure-increase switch until the hourmeter/status display shows a number from 1 to 9 (approximately 3seconds).5 Release the scrub-on/pressure-increase switch.6 Pressing and releasing the scrub-on/pressure-increase switch will now increment the limit setting to a maximum of 9. Once 9 is reached,the limit will roll-over to 1.7 To save the new setting, turn the master on/off key switch to the off position.8 The new setting will be saved and will remain in effect until it is changed again.