7 Troubleshooting
52 / 80 GB October 2013
Display Possible Cause Remedy
Error during water change in intake phase:
Poor supply of water for machine,
water pressure may be too low.
Check water pressure.
Water treatment unit faulty. Check.
Solenoid valve for water inlet
faulty.
Check.
A628:
Water change supply
Faulty water level sensor B10. Check level sensor and wiring.
Chart 7-5: Warnings triggered from the compressor (A600 - A695)
1)
System specific setting. See menu "Factory Settings"
2)
System specific setting. See menu "Control"
3) Monitoring through optional device/sensor connected to a programmable digital input. See chap-
ter "Programmable Inputs" and wiring diagram
4) Monitoring through optional device/sensor connected to a programmable digital input. See chap-
ter "Configuration".
Warnings triggered by the frequency converter (VSD) (A700 - A731) (RS)
Display Possible Cause Remedy
A700:
VSD Temperature High
Frequency converter (VSD) tem-
perature close to trip tempera-
ture.
Check the cooling air inlet filter
of the switch cabinet for dirt and
renew if necessary. See the com-
pressor operating instructions.
Ensure that the through ventila-
tion of the switch cabinet and the
VSD fans are working correctly.
Check VSD outlet and inlet for
blockages in the cooling air sup-
ply and dirty cooler fins.
Chart 7-6: Warnings triggered by the frequency converter (VSD) (A700 - A731) (RS)
Other faults
Fault Possible Cause Remedy
A fault/warning cannot be
acknowledged.
Fault/warning still in place. Find cause and remedy.
Incorrect display of volume flow. Volumetric flows incorrectly set. Check the max. and min. volume
flow in the menu "Configuration".
See chapter "Menus / configura-
tion".
Unit not automatically starting after
power loss.
Automatic restart after power fail-
ure is not enabled. Power loss
lasted too long.
1)
Activate automatic restart after
power failure.
Unit runs continuously in off-load
without independently switching to
readiness (stand-by).
Operating mode "Continuous
operation" selected.
1)
Very brief pressure demand dur-
ing the run-on time.
Select operating mode "Auto-
matic operation".
Chart 7-7: Other faults
1)
Unit-specific setting: See "Control" menu.
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