7 Troubleshooting
48 / 80 GB October 2013
Display Possible Cause Remedy
Solenoid valve for water outlet
faulty.
Check.
Dirt trap in front of solenoid valve
dirty.
Check dirt trap.
Outlet ball valve closed? Open ball valve.
Faulty water level sensor B10. Check level sensor and wiring.
Recurring error during water change in intake stage (warning A628
already activated):
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.
E421:
Water change supply
Faulty water level sensor B10. Check level sensor and wiring.
Incorrect phase sequence. Check phase sequence and cor-
rect if necessary.
E422:
Phase monitoring
Loss of one or more phases. Check the power supply.
Chart 7-3: Faults triggered by the compressor (E400 - E495) (RS)
1)
System specific setting. See "Factory Settings" menu.
3) Monitoring through optional device/sensor connected to a programmable digital input. See chap-
ter "Programmable Inputs" and wiring diagram.
Faults triggered by the frequency converter (VSD) (E500 - E531) (RS)
Display Possible Cause Remedy
E500:
Pre-Adjustment VSD
The VSD was faulty or not
programmed (replacement
device), so that it had to be repro-
grammed by the DELCOS XL.
E501:
Pre-Adjustment
The VSD was faulty or not
programmed (replacement
device), so that it had to be repro-
grammed by the DELCOS XL.
E502:
VSD Locked
Error during programming of the
VSD.
Contact Gardner Denver Service.
E503:
VSD Write Fault
Error during programming of the
VSD.
Contact Gardner Denver Service.
E504:
VSD Communication
Communication with the VSD
interrupted, VSD does not
respond.
Main contactor (Compressors
with PowerFlex 400 VSD only)
Check the Modbus interface
wiring.
If no fault is found, contact
Gardner Denver Service.
Chart 7-4: Faults triggered by the frequency converter (VSD) (E500 - E531) (RS)
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