52
E N G L I S H
µC
2
- +030220731 - rel. 1.2 - 26.10.2007
L: Low load warning
The warning does not activate the relay and displays the message “ L ”; reset is automatic.
D1: defrost signal circuit 1
When the defrost is on circuit 1, the display shows the message D1.
D2: defrost signal circuit 2
When the defrost is on circuit 2, the display shows the message D2.
Driver
All the driver alarms on the µC
2
that stop the unit feature automatic reset. Consequently, the possibility to
select the automatic resetting of the entire system must be selected for the drivers by setting the corre-
sponding parameters. The µC
2
can send the Go Ahead command according to the normal procedure for
resetting the alarms from the keypad.
Ed1: tLan communication error with Driver 1
The alarm is generated after a fixed time (5 s) from when the µC
2
loses contact with Driver 1. In this case,
circuit 1 is disabled for safety reasons.
Ed2: tLan communication error with Driver 2 (expansion card)
As for Ed1, but relating to driver 2.
SH1: low superheat alarm circuit 1
The low superheat alarm for circuit 1, after a fixed time (5 s), inhibits the circuit 1 for safety reasons.
The risk is that the compressors will flood.
SH2: low superheat alarm circuit 2
As for SH1, but relating to driver 2
nO1: MOP warning (maximum operating pressure) circuit 1
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
nO2: MOP warning (maximum operating pressure) circuit 2
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
LO1: LOP warning (lowest operating pressure) circuit
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
LO2: LOP warning (lowest operating pressure) circuit 2
As for LO1, but relating to driver 2
HA1: high evaporator temperature warning circuit 1
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
HA2: high evaporator temperature warning circuit 2
As for HA1, but relating to driver 2.
EP1: EEPROM error driver 1
The circuit 1 is disabled for safety reasons, as the status of Driver 1 is not known.
EP2: EEPROM error driver 2
As for EP1, but relating to driver 2.
ES1: probe error driver 1
The circuit 1 is disabled for safety reasons, as the status of Driver 1 is not known.
ES2: probe error driver 2
As for ES1, but relating to driver 2.
EU1: EVD 1 error, valve open when starting
If when starting the system the Driver detects that the valve is still open, an alarm is sent to the µC2 that
stops the compressors and the fans in the corresponding circuit.
EU2: EVD 2 error, valve open when starting
As for EU1, but relating to EVD 2.
Eb1: EVD 1 battery alarm
The EVD 1 battery alarm stops the compressors from starting so as to prevent the risk of liquid returning
to circuit 1, and disables the corresponding fans.
Eb2: EVD 2 battery alarm
The EVD 2 battery alarm stops the compressors from starting so as to avoid the risk of liquid returning to
circuit 2, and disables the corresponding fans.
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