Carel MuC2SE, Руководство пользователя

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35
µC
2
SE process c030220416
- rel. 2.3 - 17.05.2018
AHt: high temperature on plant switch-on warning. The warning does not activate the relay and displays the "AHt" message.
ALt: low temperature on plant switch-on warning. The warning does not activate the relay and displays the "Alt" message.
ELS/EHS: warning low/alarm high power supply voltage warning. If the power supply voltage is too high or too low, the relative message appears on
the display. Correct operation of μC
2
SE is not guaranteed. The low voltage only leads to the execution of the loads switch-off request. Any switch-on
requests remain pending. High voltage leads to switch-off of all excited relays.
L: low load condition warning. The warning does not activate the relay and displays the "L" message; reset is automatic.
Driver
All of the driver alarms that block the unit are self-resetting, for μC
2
SE. Therefore the possibility to select self-reset of the entire system must be
selectable from the driver itself via the relevant parameters. μC
2
SE can give the Go Ahead command according to the usual alarms reset procedure
from keyboard.
Ed1: tLAN communication error with the Driver.
The alarm is generated after a fixed time (5 s) from when μC
2
SE has lost contact with the Driver. In this case, the unit is inhibited for safety reasons.
SH1: low overheating alarm.
The low overheating of circuit 1 alarm, stops circuit 1 for safety reasons after a fixed period of time (5 s). The risk is that the compressors are
flooded.
nO1:
MOP warning (maximum operational pressure).
The warning appears on the display.
LO1: LOP warning (minimum operational pressure).
The warning appears on the display.
HA1: evaporator high temperature warning. The warning appears on the display.
EP1: EEPROM driver error. The circuit is inhibited for safety reasons, as there is no driver status.
ES1: probes driver error. The circuit is inhibited for safety reasons, as there is no driver status.
EU1: Valve open error EVD 1 start I, in system start-up, the driver detects the valve is still open, the alarm has passed to μC
2
SE, which switches the
compressors and fans off.
Eb1: EVD battery alarm. The EVD battery alarm inhibits compressor start-up to prevent the risk of liquid return from the circuit and relative fans.
8.3 Alarm digital inputs/outputs
Alarm digital inputs
The following digital inputs cannot be configured (see wiring diagram):
The configuration of the digital inputs as for flow switch/pump thermal overload/general alarms with manual/automatic reset can be performed from
parameter. If the device connected to the digital input intervenes, the alarm occurs with that displayed described in the alarms table.
Alarm digital outputs
The following digital output cannot be configured.
µC
2
SE: the function of digital outputs as alarm can be configured from parameter (P25…P28). On occurrence of any of the alarms in the alarms
table, the output selected as alarm output switches-over.
I/O expansion board : the function of digital outputs as alarm can be configured from parameter (P42…P46). In this case, the output only switches-
over if the selected alarm occurs.
Par. Description Def Min Max U.M.
P21
Alarm relay output logic
0/1=Normally unexcited/excited
0 0 1 0
P25
Digital output 2 selection - 10 = Alarm
0 0 11 0
P26
Digital output 3 selection - See P25
0 0 11 0
P27
Digital output 4 selection - See P25
0 0 11 0
P28
Digital output 5 selection - See P25
0 0 11 0
P42
Digital output 11 selection
0 = not used
1…5 = Ad1…Ad5
6 = Circuit 1 high pressure alarm
8 = Circuit 1 low pressure alarm
10 = Circuit 1 thermal overload
12 = Flow switch alarm
13 = Low temp. alarm
14 = High temp. alarm
15 = Low temperature alarm at start-up
16 = High temperature alarm at start-up
17 = Pump thermal overload
18 = Do not select
0 0 18 0
P43
Digital output 12 selection - See P42
0 0 18 -
P44
Digital output 13 selection - See P42
0 0 18 -
P45
Digital output 14 selection - See P42
0 0 18 -
P46
Digital output 15 selection - See P42
0 0 18 -
ID3 High pressure alarm input
ID4 Low pressure alarm input
NO1 Compressor output