Decommissioning; Troubleshooting - Pfannenberg PWT 6402 Instrucciones De Servicio

GB
5.6

Decommissioning

WARNING
Danger of injury from materials and substances
Improper work on the unit may cause damage to health.
 Always ensure that the power supply is disconnected prior to working on the unit.
 Only properly qualified personnel should dispose of the unit in accordance with applicable
environmental regulations.
The power supply must be interrupted if the air/water heat exchanger is not required for an extended period of time.
 Ensure that improper commissioning by third parties is ruled out.
Final decommissioning
CAUTION
Danger of crushing when decommissioning the unit
Hands and other body parts may be crushed when removing units.
 Do not place any body parts between the frame, springs and the unit cut-out.
If air/water heat exchangers are permanently decommissioned or disposed of, observe the following:
• Comply with the applicable statutory regulations of the country of use and environmental protection
requirements.
• The air/water heat exchanger must only be disposed of by authorized specialist personnel.
 Old units are also professionally disposed of by Pfannenberg. Delivery to one of our manufacturing facilities
shall be free of charge.
6

Troubleshooting

Fault
Unit does not cool,
Fan running
Unit does not cool
sufficiently
Condensate
formation in the
switch cabinet
Condensate does not
drain
Operating Manual PWT 6402 230V / 400V 086100107 © Pfannenberg GmbH
Possible causes
• Temperature setting too high.
• Solenoid valve closed triggered by
float switch.
• Application limits exceeded.
• Heat exchanger contaminated.
• Fan defective.
• Air circulation in switch cabinet
disrupted.
• Blow-out temperature too low.
• Switch cabinet is not sufficiently
sealed.
• Condensate drain is blocked.
Remedial measures
 Check temperature setting.
 Check condensate drain.
 Call authorized specialist personnel; check
float switch position/ function.
 Check ambient air temperature and internal
load.
 Call authorized specialist personnel, check the
unit for leaks.
 Clean heat exchanger.
 Call authorized specialist personnel; change
fan.
 Check installations and circulation channels in
the switch cabinet.
 Check the air inflow and outflow from the
air/water heat exchanger into the inlet and
outlet openings of the switch cabinet.
 Close switch cabinet door.
 Rectify any leaky areas or seals on the switch
cabinet.
 Check temperature setting.
 Clean the condensate drain.
 Check whether the condensate drain hose is
free of kinks and installed on a gradient.
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