User manual

µC
2
SE process chiller +030220416 - rel. 2.2 - 25.01.2013
8 ALARMS
8.1 Type of alarms
The alarms cause the LED on the display to switch on. There are two types:
• serious: they cause the total switch-off of the controller: e.g. high power supply
voltage, communication error with I/O expansion board;
• slight: cause one or more devices to switch off: high/low pressure alarm
(compressor switch-off), anti-freeze (compressor/fan switch-off), etc.
Their intervention depends on the setting of the threshold and activation delay
parameters. The Eeprom alarm always generates controller block. The alarms can
be always with automatic reset once the cause has been eliminated or with
manual/automatic reset depending on a parameter (P05/P08). The controller
digital outputs NO2…NO5 can be configured as alarm relays (parameters P25,…,
P28): depending on the alarm that intervenes, the output is excited /unexcited on
the basis of parameter P21.
On the basis of the following table, the alarm can cause the output to switch-over
(ON), switch-off (OFF) or the output maintains the previous status (-). Instead, the
I/O expansion board digital outputs can switch-over individually on the basis of a
single alarm (parameters P42, …, P46).
ALARMS TABLE
Alarm
display
Alarm type Reset Compressor Pump
Fan Heater Exp.
valve
Output
alarm
I/O exp.
board
Superv.
variable
Superv. variab.
description
Variable type
I/O Communication error with I/O
board
Automatic OFF OFF OFF OFF OFF OFF - - Display signal Digital
HP1 High pressure Depends on P05 OFF C1-2 - ON(60”) - - ON - 41 (R) Circuit 1 alarm Digital
LP1 Low pressure Depends on P05 OFF C1-2 - OFF - - ON - 41 (R) Circuit 1 alarm Digital
tP General thermal overload Depends on P08 OFF OFF OFF - - ON - 45 (R) General alarm Digital
tC1 Circuit 1 thermal overload Depends on P08 OFF C1-2 - OFF - - ON - 41 (R) Circuit 1 alarm Digital
LA General warning Depends on P08 - - - - - ON - 50 (R) General warning Digital
FL Flow switch alarm Depends on P08 OFF OFF OFF - - ON - 45 (R) General alarm Digital
FLb Backup pump warning Automatic - - - - - - - 50 (R) General warning Digital
E1 Probe B1 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital
E2 Probe B2 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital
E3* Probe B3 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital
E4* Probe B4 alarm Automatic OFF OFF OFF OFF - ON - 46 (R) Probes alarm Digital
Hc1-2 Comp. 1-2/pumps hour
warning
Automatic - - - - - - - 47 (R) Compress. warning Digital
EPr EEPROM error during
operation
Automatic - - - - - - - 50 (R) General warning Digital
EPb EEPROM error at start-up Automatic OFF OFF OFF OFF OFF OFF - 45 (R) General alarm Digital
EL1 Zero crossing Automatic - - 100% - - ON - 52 (R) Fans warning Digital
A1 Anti-freeze alarm Depends on P05 OFF C1-2 - OFF - - ON - 41 (R) Circuit 1 alarm Digital
Ht High temperature Automatic - - - - - ON - 51 (R) Temperature warning Digital
Lt Low ambient temp. Depends on P05 - - - - - ON - 51 (R) Temperature warning Digital
AHt High temperature at start-up Automatic OFF - OFF OFF - - - 50 (R) General warning Digital
ALt Low temperature at start-up Automatic OFF - OFF OFF - - - 50 (R) General warning Digital
ELS Low supply voltage Automatic - - - - - - - 50 (R) General warning Digital
EHS High supply voltage Automatic OFF OFF OFF OFF OFF OFF - 45 (R) General alarm Digital
Ed1 EVD tLAN error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital
SH1 EVD overheat alarm - OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital
nO1 MOP warning Automatic - - - - - - - 48 (R) EVD warning Digital
LO1 LOP warning Automatic - - - - - - - 48 (R) EVD warning Digital
HA1 High inlet temperature
warning circ.1
Automatic - - - - - - - 48 (R) EVD warning Digital
EP1 EVD Eeprom error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital
Par. Description
Def Min Max U.M.
P05
A
larms rese
t
0=HP1/LP1/A1/Lt manual
1=HP1/LP1/A1/Lt automatic
2=HP1/A1/Lt manual; LP1 automatic
3=HP1 manual; LP1/A1/Lt automatic
4=HP1/LP1 manual; A1/Lt automatic
5=HP1/LP1 (3 times in one hour) manual;
A1/Lt automatic
6=HP1/LP1 (3 times in one hour) manual;
A1/Lt manual
006-
P21
A
larm relay output logic
0/1=Normally unexcited/excited
0
Example: probe B1 alarm
35