Stulz C2020 - Page 97

EN/07.2013/58/97
Manual control
The speed of Free-Air fan can be controlled manually by the menu VE speed in manual control. The speed of Free-Air
fan (V3) is set equal to the speed of evaporator fans (V1 e V2).
Alarms
• High temperature: if the high temperature alarm occurs in night mode, the compressor is enabled.
• Broken probe TI: when this alarm occurs, the Free-Air fan is blocked.
• Broken probe TAE: when this alarm occurs, the Free-Air fan is blocked.
• Fire - smoke: when this alarm occurs, the Free-Air fan is blocked.
• Intrusion - vibration: when this alarm occurs, the Free-Air fan is blocked.
• Free-Air fan blocked
The parameter involved is:
– M82 EVAPORATOR FAN CONFIGURATION: pre-set = 7
To enable this alarm, the parameter M82 must be set in according to the following table:
Fans configuration Fan present
4 VE3
5 VE3 & VE1
6 VE3 & VE2
7 VE3 & VE2 & VE1
When this alarm occurs the following message will be displayed on the screen:
ENGLISH ALARM FREE AIR BLOCKED
• Freecooling
This alarm occurs when TI > 12 °C and (TM - TI) > 2 °C.
This alarm is delayed of 5 seconds from the appearing of its cause.
It’s possible to connect the alarm to a relay and/or to associate it to a “common warning” or to a “common alarm”
relay by I69. The reset is automatic.
When this alarm occurs, the following message will be displayed on the screen:
ENGLISH ALARM FREE COOLING
Visualization on CO3 user
In the fourth screen (d) it’s shown the status of Free-Air fan.
dd/mm/yyyy hh:mm
CP OFF VE OFF FAXXX%
HEATER OFF
State of the system
Status of free air fan:
- OFF
- XXX%