Tables Of Alarms And Signals; Alarms; Signals - Carel ACC User Manual

8. Tables of alarms and signals

8.1

Alarms

The alarm status is indicated by the red LED
status of the red LED description
off no alarm
on parameter error alarm
flashing 1 impulse probe alarm (Master)
probe or LAN connection alarm (Slave)
flashing 2 impulses external alarm
The status of the digital input that activates the external alarm depends on the operating logic set (by default normally open)
If there are multiple alarms activated at the same time, the first in order shown in the table is signalled.
The active alarm status forces the output to the value defined by the ALMO parameter.
The alarm status is available via serial line.
8.2

Signals

Power is signalled by the green LED.
The status of the serial connection is signalled by the yellow LED.
status of the yellow LED description
off connection deactivated
flashing data reception
on connection active
The serial connection is automatically deactivated 10 seconds after the last valid data is received.
If the Master is in LAN serial mode (Dip 1 and Dip 2 = ON), the yellow LED has the following meaning:
on connection active
flashing data transmission
Code +030220751 – Rel. 1.2 – 09/10/07
possible causes of alarm
non-volatile memory error (EEPROM)
probes disconnected or short-circuited
probes disconnected or short-circuited, or failed update of the dewpoint via LAN
closing of the contact connected to the digital input
possible causes
cable disconnected
supervisor off-line
protocol not supported
await data reception from Master or Supervisor
data reception in progress
the connection is active, but no data has been received for less than 10 s
the connection is active, but no data is being sent
the Master is sending data to the slaves connected to the LAN
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ACC –Anti-sweat controller