46
cyberlab original instructions
EN/02.2018/G17F © STULZ GmbH – all rights reserved
Alarm message
Cause for alarm
Cause
Elimination
Compressor # error
High pressure switch has
triggered
1. Condenser coil soiled.
Clean condenser.
or
2. Electric connection of high pres-
sure switch loose. Cable defective.
Check connection and cable.
3. Overfilling of refrigerant circuit
Discharge and dispose refrigerant.
4. Condenser fan defective.
Check function.
5. Trigger point adjusted too low.
(with option: adjustable HP-switch)
Check setting of high pressure switch.
6. Outside temperature too high
Install bigger condenser.
Press red release button at HP switch
after elimination of error.
Compressor power interruptor
has triggered.
1. Compressor motor defective.
Check compressor motor on voltage continuity
and current consumption.
2. Feeding voltage too low.
Check alimentation under load.
Airflow failure
Differential pressure for airflow
switch has triggered.
1. Fan motor defective. Fan speed
too low.
Check fan motor on voltage continuity and cur
-
rent consumption.
Check if fan is mechanically blocked.
2. Air filter extremely clogged.
Check air filter.
3. Hoses to the airflow monitor dirty
or kinked.
Clean hoses and check whether they are kinked
.
Sensor # error
The tolerance to the average
value adjustable in the control
-
ler has been exceeded.
1. Big difference of measured valu
-
es in selected zone.
Check room on Hotspots or chilled air zones,
moist zones.
2. sensor defective.
Check measured value with an external measu
-
ring instrument.
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 thermo
-
meter, hygrostat, pressure gauge.
Depending on the option configured in the controller further alarm messages exist.
# stands for a number in case of several components of the same kind.
For A/C units with EC compressor exist further alarm messages, which are explained in the C7000 Service manual.
8. Malfunction