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5.4
Maintenance
DANGER
Danger of fatal injury due to electric shock
Voltage-carrying units and exposed connection cables may cause electric shocks and serious accidents.
➢ Only qualified personnel may open, troubleshoot and replace components on the unit.
➢ Always ensure that the power supply is disconnected prior to working on the unit.
WARNING
Danger due to improper maintenance work
Damage to components and improper replacement of parts may cause accidents.
➢ Always switch off the disconnector/contactor prior to starting maintenance work.
➢ Wait for the discharge phase of 5 minutes for the electrical components. The unit should only be
opened afterwards.
➢ Ensure that the fans are in the idle position and do not rotate.
➢ Check the unit for proper and safe operation after replacing defective parts or components.
➢ Check the full performance of the condensate drain following each maintenance operation or
replacement of spare parts.
WARNING
Spare parts from other manufacturers may cause damage to the unit and accidents.
➢ Only original parts are subject to quality control by the manufacturer.
➢ Only use specially designed manufacturer parts to ensure safe and reliable operation.
For Pfannenberg part numbers for spare parts; see
NOTE
Danger of damage to the unit due to irregular maintenance
Non-compliance with the recommended maintenance work reduces the cooling capacity of the air/water heat
exchanger and may lead to reduced machine availability.
➢ Regularly carry out maintenance work in accordance with the maintenance checklist.
➢ Only units serviced in accordance with specifications are covered by the warranty.
The following provisions have been made in the factory:
• All air/water heat exchangers are factory tested for leaks in accordance with: DGUV-R 100-500, 2.35 (operation
of refrigeration systems, heat pumps and cooling equipment).
• A functional test run was conducted.
Pfannenberg recommendation to operators for maintenance work:
• Perform the maintenance work in accordance with the maintenance checklist every 12 months, see template
Maintenance checklist template.
• Shorter maintenance intervals are required for air/water heat exchangers that cool in ambient air containing oil
and dust. A shorter guide value of two to six months applies between the maintenance intervals.
Operating Manual PWT 6402 230V / 400V 086100107b © Pfannenberg GmbH
Ordering spare parts.
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