Condensing Unit Controller EC2-5X1
English
French
German
lP
Low pressure alarm signal flashing before indicating the actual pressure value of the
system
Controller 1: suction pressure lower than the minimum limit A2 (0 bar by default)
Controller 2: condensing pressure lower than the minimum limit A2
EP
Error pressure
Controller 1: suction pressure sensor failure
Controller 2: condensing pressure sensor failure
Fr
Fast recovery alarm (if P3 active) signal flashing before indicating the actual pressure
value
Controller 1: fast recovery from low suction pressure. Signal just before
compressor stops.
Controller 2: fast recovery from low condensing pressure (only for EC-2-511 if
active). Signal just before fan stops.
hr
High discharge pressure alarm (if P8 active) signal flashing before indicating the
actual pressure value
Controller 1: high discharge pressure recovery
Emergency run
Controller 1: runs with c6 numbers of compressors
Controller 2: runs with c6 numbers of fans
cE
Communication error
Controller 1: Communication error if binding for paralleling is used. A slave
controller then goes to emergency master mode and works with local pressure
sensor and set point.
d1
Discharge temperature alarm
Digital Scroll compressor only: Discharge end temperature is too high –
compressor stop.
E1
Feedback alarm 1 – safety loop failure of compressor 1 (safety loop, HP or LP
pressure switches, or oil level control)
Controller 1: digital input associated with compressor 1 has changed into alarm
state (safety chain)
E2
Feedback alarm 2 – safety loop failure of compressor 2 (safety loop, HP or LP
pressure switches, or oil level control)
n1
Service alarm 1
Controller 1: compressor 1 operating time higher than service limit
Controller 2: fan 1 operating time higher than service limit
n2
Service alarm 2
Controller 1: compressor 2 operating time higher than service limit
Controller 2: fan 2 operating time higher than service limit
Er
Data
error
Data send to the display is out of range
C6.1.3/0505-0705/E
Part no: 3125495
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