Stulz C2020 User Manual

EN/07.2013/58/100
• Low pressure
The alarm reset is automatic.
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay. The status of the unit when this alarm occurs is “emergency mode”.
• Air flow
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay. The status of the unit when this alarm occurs is “emergency mode”.
• Fire - smoke
The alarm reset is automatic.
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay. When this alarm occurs the damper is closed and the fans speed is set to 0 %.
• Intrusion - vibration
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay.
• Power failure
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay. The status of the unit when this alarm occurs is “auxiliary mode”.
• Wrong phase
The parameter involved is:
– I76 SELECT RELAY WRONG PHASE: pre-set = CA
The signal of alarm is A2 digital input. The alarm reset is automatic.
It’s possible to connect the alarm to a relay and/or to associate it to “group refrigeration” or to “group general alarm”
relay by parameter I76. The status of the unit when this alarm occurs is “emergency mode”.
In the following table the “alarm description” is shown as it will appear on the LCD during alarm condition or in the
alarm history menu.
ENGLISH ALARM WRONG PHASE
7.25. Custom 25
Control
The parameters involved are:
• M09 SERIAL PROTOCOL: pre-set = PEMS
• M156 ENABLE DANFOSS COMPRESSOR: pre-set = NO
When custom 25 is enabled, the C2020 controller communicates with a PLC by Modbus protocol. The C2020 controller
is the slave board. The baud rate is automatically set to 19200 bps.
When custom 25 is enabled, the Danfoss compressor must be enabled (M156 set to YES) and the parameter M09 must
be set to a value different from MODBUS STULZ or MODBUS STANDARD.
Note: in this case it’s not possible to connect the serial cable to WIB1000.
The following tables show all data points ModBus for the communication with the Danfoss compressor.

Stulz C2020 Specifications

General

Brand	Stulz
Model	C2020
Category	Controller
Language	English