/11.2015/
G17D
53
EN
Alarm message Cause for alarm
Cause
Elimination
C7000:
Compressor #
error
High pressure switch has
triggered or
Compressor power interrup-
tor has triggered.
1. outside temperature too high
2. cooling water temperature too
high
3. condenser fan defective.
4. condenser pressure switch
adjusted too high.
5. condenser coil soiled.
6. overcharge of refrigerant circuit
7. electric connection of high
pressure switch loose. Cable
defective.
8. trigger point adjusted too low.
1. compressor motor defective.
2. feeding voltage too low.
Install bigger condenser.
Check drycooler.
Check function.
Modify setting.
Clean condenser.
Discharge and dispose refrigerant.
Check connection and cable.
Check setting of high pressure
switch.
Press blue release button at HP
switch after elimination of error.
Check compressor motor on vol-
tage continuity and current con-
sumption.
Check alimentation under load.
C7000:
Low pressure #
error
(not for units
with EC com-
pressor)
Low pressure switch has
triggered.
1. condenser pressure switch
adjusted too low.
2. Insufficient refrigerant charge
3. electric connection of low
pressure switch loose. Cable
defective.
4. trigger point adjusted too high.
5. Expansion valve defective.
6. Solenoid valve in liquid line
defective.
Modify setting.
Refill refrigerant.
Check connection and cable.
Check setting of low pressure
switch.
Exchange expansion valve.
Check electric alimentation with
voltage meter.
C7000:
Airflow failure
Differential pressure for air-
flow switch has triggered.
1. Fan motor defective. Fan
speed too low.
2. Air filter extremely clogged.
3. Hoses to the airflow monitor
dirty or kinked.
Check fan motor on voltage conti-
nuity and current consumption.
Fan mechanically blocked?
Check air filter.
Clean hoses and check whether
they are kinked .
C7000:
Sensor # error
The tolerance to the average
value adjustable in the cont-
roller has been exceeded.
1. Big difference of measeured
values in selected zone.
2. sensor defective.
Check room on Hotspots or chilled
air zones, moist zones.
Check measured value with an
external measuring instrument.
C7000:
Sensor # defec-
tive
The measured voltage/cur-
rent is outside the range
defined in the controller.
1. electrical connection defective.
2. sensor cable defective.
3. sensor defective.
Check connections.
Check cable on continuity.
Check measured value with
external thermometer, 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.
9. Malfunction
