Pfannenberg EB 210, Operating And Maintenance Instructions Manual

Page: 92 / 293

Operating and Maintenance Instructions - Chiller - Series EB 210 - EB 440 © Pfannenberg GmbH Page 92 / 293
EN
NOTICE
High pressure switch reset
After the high pressure switch has switched off the refrigerating cycle, it needs a manual reset to start the
cooling cycle again by pressing the appropriate button on the machine display.
Troubleshooting tips
Symtoms Possible cause Proposed remedy
Unit stops and does
not start again due to
switching of high
pressure switch Dirty condenser Clean the condenser with
a) a soft bristle (not wire!) brush
b) compressed air blown from the inside out
c) water rinse from inside out and top to
bottom
Do not use any chemicals or a pressure
washer!
Broken fan Replace the fan
Reversed fan rotating direction Verify the connection on the terminal board
of the electrical box
Ambient temperature too high Provide adequate ventilation with air at max
or lower temperature as specified
Set up the chiller in a colder place
Water setpoint too high (in
combination with high ambient
temperature) Reduce the water temperature set-point
Chiller operating without lateral
panels Mount the panels on the unit
Note: after solving the cause of the fault, start the chiller by pressing the reset
button.
No coolant
circulation Pump is down Verify the connection on the terminal board
of the electrical box
Reversed pump rotating direction Check the right rotation of the electrical
motor
Pressure loss of application too high Verify the regulation of hydraulic bypass
where installed
Verify circuit pressure drop to reach the
nominal flow rate