Operating manual ef cooling Ernst H. Furrer AG
Cooling unit EVO 45, 0390.013 Issue: 07 / 2015 Chapter-Page 9-27
9 Repair
9.1 Safety
Danger
Unintentional start-up of the cooling unit can result in considerable danger.
Before commencing any repair work, the cooling unit must be switched off at the main
switch and secured against being switched back on without authorisation.
Non-observance of this instruction can lead to serious physical injury with fatal
consequences.
Note
Proper execution of the repair work is prerequisite for safe and fault-free operation.
9.1.1 Personnel qualification
This cooling unit must only be repaired by personnel who fulfil the following requirements:
• Have read and understood Chap. 2 Safety
• Have completed basic mechanical and electrical training
• Authorised to handle refrigerant
(e.g. in Switzerland: Certificate from responsible testing body)
9.2 Replacing air and water filters
9.2.1 Replacing air filters
Remove the fouled filter mat from the frame and insert a new filter mat into the frame. Make
sure that the filter mat is positioned flat on the grid and does make waves.
9.2.2 Replacing the water filter
Undo the filter cup of the water filter with the filter wrench and remove. Make sure that the O-
ring doesn’t get lost. Replace the water filter with the same type. Make sure that the O-ring sits
uniformly in the groove of the filter cup. Screw the filter cup into the filter head. Tighten slightly
with the filter wrench.
After switching the cooling unit back on, check the O-ring for leaks. Flow alarms appear if air is
expelled from the filters and the lines. Wait one minute to acknowledge the fault. Check the
water level. If necessary, top up the water / propylenglycol mixture to the "Max." mark.
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