User manual

µC
2
SE process chiller +030220416 - rel. 2.2 - 25.01.2013
Alarm
display
Alarm type Reset Compressor Pump Fan Heater Exp.
valv
e
Output
alarm
I/O exp.
board
Superv.
variable
Superv. variab.
description
Variable type
ES1 EVD probe error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital
EU1 Open valve EVD 1 error at start-
up
Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital
Eb1 EVD battery alarm Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital
L Low load warning Automatic - - - - - - - - Display signal -
Ed1 tLan EVD communication error Automatic OFF C1-2 - OFF - - ON - 43 (R) EVD alarm Digital
PH1 Partialisation warning due to high
pressure
- - - - - - - - - Display signal -
Ad1 Dig. input 11 warning Manual - - - - - ON
√
86 (R)** OUT 11 state Digital
Ad1 Dig. input 11 alarm Manual OFF OFF OFF OFF OFF ON
√
86 (R)** OUT 11 state Digital
Ad2 Dig. input 12 warning Manual - - - - - ON
√
87 (R)** OUT 12 state Digital
Ad2 Dig. input 12 alarm Manual OFF OFF OFF OFF OFF ON
√
87 (R)** OUT 12 state Digital
Ad3 Dig. input 13 warning Manual - - - - - ON
√
88 (R)** OUT 13 state Digital
Ad3 Dig. input 13 alarm Manual OFF OFF OFF OFF OFF ON
√
88 (R)** OUT 13 state Digital
Ad4 Dig. input 14 warning Manual - - - - - ON
√
89 (R)** OUT 14 state Digital
Ad4 Dig. input 14 alarm Manual OFF OFF OFF OFF OFF ON
√
89 (R)** OUT 14 state Digital
Ad5 Dig. input 15 warning Manual - - - - - ON
√
90 (R)** OUT 15 state Digital
Ad5 Dig. input 15 alarm Manual OFF OFF OFF OFF OFF ON
√
90 (R)** OUT 15 state Digital
(*): if the probe is set for compensation, the unit will continue to operate in the event of a fault.
(**): status of the output selected with parameters P42…P46.
8.2 Alarms description
HP1: high pressure. The alarm is detected irrespective of the status of the pump
and the compressors. The compressors are immediately stopped (ignoring the set
protection times), the alarm relay is activated, and the display starts flashing. The
condensing fan is activated at maximum speed for 60 s to oppose the alarm, after
which it is switched off. This alarm may also be generated when the high pressure
limit is exceeded (active only when pressure transducer is fitted) set by the
parameter P18, which to be enabled must be greater than 3.0 bar, due to the
corresponding hysteresis.
The following figure the graphics shows alarm automatic reset.
LP1: Low pressure
The alarm depends on P15, on P7 and on P3.
P15=1, P07= 1: the alarm is detected after time P03 with compressors off or active
depending on P15. The hysteresis for this alarm is 1 bar.
tP: General overload
The alarm is detected irrespective of the status of the pump and the compressors.
The compressors, the pumps and fans stop (without observing the protection
times) or are inhibited from starting, the alarm relay is activated, the display flashes
the corresponding message, and the LED flashes. It can be reset either manually or
automatically (see par. P08, P09, P13).
tC1: Circuit thermal overload.
LA: general warning.
This represents a generic warning that appears on the display, via digital input,
without modifying the operation of the unit, the alarm relay will be activated.
FL: flow switch alarm.
This alarm is detected only if the pump is on (excluding the delays when starting
P01 and P02 in normal conditions), irrespective of the status of the compressor. All
outputs are disabled: pump, compressor (without respecting switch-off times),
condenser fan and the alarm relay is activated and the display flashes. The
presence of the utility water pump must be enabled (H50). It can be reset either
manually or automatically (see P08, P09, P13).
Par. Description
Def Min Max U.M.
P18 High pressure alarm threshold
0=alarm disabled
20 0 99,9 ba
r
P36 High pressure alarm managemen
t
0 = Always
1 = With compressor active, after 2 s
from activation
0 0 1 -
ON
OFF
t
HP1
B4
P18
P18 - 3
Key
t
time
36