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EN/05.2019 © STULZ GmbH – all rights reserved
CYBERHANDLER 2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Alarm message
Cause for alarm
Cause
Elimination
C7000:
Compressor #
error
High pressure switch
has triggered or
1. outside temperature too high
Install bigger condenser
2. cooling water temperature too
high
Check drycooler.
3. condenser fan defective
Check function.
4. condenser pressure switch adjusted
too high
Modify setting
5. condenser coil soiled.
Clean condenser.
6. overcharge of refrigerant circuit
7. electric connection of high pressure
switch loose. Cable defective.
Check connection and cable.
8. trigger point adjusted too low.
Check setting of high pressure switch.
Press blue release button at HP switch
after elimination of error.
1. compressor motor defective
Check compressor motor on voltage
continuity and current consumption.
Compressor power
interruptor
has triggered.
2. feeding voltage too low.
Check alimentation under load.
C7000:
Low pressure #
error
(not for units
with EC compressor)
Low pressure switch
has triggered.
1. condenser pressure switch
Modify setting.
adjusted too low.
2. Insufficient refrigerant charge
Refill refrigerant.
3. electric connection of low
pressure switch loose. Cable
defective.
Check connection and cable.
4. trigger point adjusted too high.
Check setting of low pressure switch.
5. Expansion valve defective.
Exchange expansion valve.
6. Solenoid valve in liquid line defective Check electric alimentation with
voltage meter.
C7000:
Sensor # error
The tolerance to the
average value adjust-
able in the controller
has been exceeded.
1. Big difference of measured
values in selected zone.
Check room on Hotspots or chilled
air zones, moist zones.
2. sensor defective.
Check measured value with an
external measuring instrument
C7000:
Sensor # defective
The measured
voltage/current
is outside the range
defined in the
controller.
1. electrical connection defective.
Check connections.
2. sensor cable defective.
Check cable on continuity.
3. sensor defective
Check measured value with
external thermometer, hygrostat,
pressure gauge.
Depending on the option configured in the controller further alarm messages exist, which are explained in the C7000 Service
manual.
# stands for a number in case of several components of the same kind.
0918_V0 - ©
STULZ Tecnivel, S.L
.
