Preface; Daily Maintenance - NF DP Series Instruction Manual

9. Maintenance
9.1

Preface

This chapter describes:
 daily maintenance
 cautions and storing for nonuse over a long period
 cautions and repackaging for transportation.
 checking firmware version
For the simple operation check, see 2.7.
9.2

Daily Maintenance

The product shall be installed in a location that satisfies the installation conditions (see 2.2).
 When the panel or case is dirty
Wipe it with a soft cloth. If the dirt is heavy, wipe it with a cloth wrung out with diluted neutral
detergent solution.
CAUTION
 Do not use solvents (thinners, benzine, etc.) or wipes. Otherwise, the surface may be altered or
the coatings may be peeled off.
 When the front grill air filters are dirty
A front grill is provided with air filters for removing dust or dirt from the intake air. Clogged air
filters deteriorate the ventilation, resulting in excessive high temperature inside the product. This
may activate the overheat protection, affecting the operation, or damage the internal parts, resulting
in failure. Regularly check the air filters for dirt, about once a month. If air filters are found dirty,
rinse with water to remove the dirt, dry completely, then remount them. You can optionally request
additional air filters for replacement (see 7.4).
CAUTION
 Do not install the product in a place with a large amount of extremely fine dust (e.g., powders).
The air filters may not fully work.
 Do not install the product in a damp place prone to dew. The air filters are more likely to be
clogged.
WARNING
 Before removing the air filters and the front grill, be sure to cut the power to the distribution
board. Otherwise, an electric shock might occur.
262 PROGRAMMABLE AC POWER SOURCE