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5.3
Maintenance
DANGER
Life-threatening danger due to electric shock
Live units and exposed connection cables can generate an electric shock and cause severe accidents.
➢ Opening, troubleshooting and replacement of components on the unit must only be carried out by qualified
personnel.
➢ Always ensure that the unit is de-energized before working on the unit.
WARNING
Danger due to improper maintenance work
Damage of components and faulty replacement of components can cause accidents.
➢ Always switch off the disconnector/contactor before beginning with maintenance work.
➢ Ensure that the fans are in idle position and no longer rotate.
➢ After replacement of defective parts or components, inspect the unit for correct and safe operation.
➢ After all maintenance or replacement of spare parts, check to ensure the full capability of the condensate
drain.
WARNING
Spare parts from third-party manufacturers can damage the unit and cause accidents.
➢ Only original parts are subject to the manufacturer's quality control.
➢ Only use specially harmonized manufacturer parts for safe and reliable operation.
For Pfannenberg spare part numbers, see
NOTE
Danger of unit damage due to incorrectly performed maintenance
Disregard of the recommended maintenance work reduces the cooling capacity of the air/ water heat
exchanger and can result in reduced machine availability.
➢ Maintenance work must be carried out regularly, as specified in the maintenance checklist.
➢ Warranty claims are only valid for units that have been maintained according to specifications.
The refrigerant circuit is a maintenance-free, hermetically sealed system. The following preparations
are made at the factory:
• All air/water heat exchanger seals are tested in the factory in accordance with: DGUV-R 100-500, 2.35
(operation of refrigeration plants, heat pumps,and cooling equipment).
• A functional test run was carried out.
Pfannenberg recommendation to the operator for maintenance work:
• Carry out maintenance work regularly, every 12 months, according to the maintenance checklist; see the
template
Maintenance checklist
• Shorter maintenance intervals are required for air/ water heat exchangers that cool in oil and dust-laden ambient
air. A reduced guideline value of two to six months between maintenance intervals applies.
The functions of Pfannenberg filters are optimally matched to the air/ water heat exchangers. Therefore, use of
Pfannenberg filters has a positive effect on the scope of maintenance work.
Operating manual PWS and PWI 6502 T 086100066a © Pfannenberg GmbH
Spare
part orders.
template.
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