ST-SP Pag.
53 Rev 02 05/13
UK
*ATTENTION:
To unlock the keyboard, simultaneously press “SET” and “ON/OFF” for at least 5 seconds.
**ATTENTION:
the “LAN” network parameter is only used in case of MASTER/SLAVE and TELEMANAGEMENT
functioning.
5.2Alarm signals
If an alarm arises the circuit starts up the following:
the display shows the related alarm code. Specifically the controller displays the alarm code and the temperature normally
displayed alternatively;
the alarm LED is lit;
the alarm relay is activated.
For some alarms and alerts the led and/or the relay are not activated. By pressing any button the relay turns off (if activated) and
the led flashes, while the alarm code remains displayed. The led turns off and the alarm code disappears only when the problem
is resolved. Table 7 explains each alarm and related actions to be undertaken.
Table 7 – Alarms description
.
Code
displayed
Description/Control
LED
enable
Relay
enable
Reset Mode
E1
cold room probe temperature error
if a probe is used for adjustment, the compressor will be activated
cyclically and defrosting cycles will be disabled;
if a balanced network probe is enabled, adjustment will continue,
bypassing the malfunctioning probe
yes yes
automatic when the condition
ceases
E2
End defrostin probe g error
defrosting will end due to timeout
yes yes
automatic when the condition
ceases
E3
3
rd
probe error (condenser temperature)
the associated controls are disabled
blink. no
automatic when the condition
ceases
3
rd
probe error (2nd evaporator temperature)
defrosting will end due to timeout
yes yes
heat alarm (*)
adjustment is disabled
yes no
automatic when the condition
ceases
HP pressure switch alarm(*)
adjustment is disabled
yes no
automatic when the condition
ceases
LP pressure switch alarm(*)
adjustment is disabled
yes no
automatic when the condition
ceases
E4
repeated heat alarm
adjustment is disabled permanently
yes yes
at switch on
E5
repeated HP pressure switch alarm
adjustment is disabled permanently
yes yes
at switch on
E6
repeated LP pressure switch alarm
adjustment is disabled permanently
yes yes
at switch on
LO
low temperature alarm
yes yes
automatic when the condition
ceases
HI
high temperature alarm
yes yes
automatic when the condition
ceases
EE
data saving alarm
default parameters are loaded
yes yes
at power-on or after the
parameter has been stored to
memory
Ec
condenser cleaning alarm
blink. no
automatic when the condition
ceases
Er
network alarm (**)
yes yes
automatic when the condition
ceases
Ed
defrosting timeout alarm
blink. no
automatic at the start of the
next defrost
Od
door open timeout alarm
normal operation is enabled again
blink. no
automatic when the condition
ceases
nx
slave x alarm (on master only)
yes progr.
automatic when the condition
ceases
Ux
slave x not connected (on master only)
the slave is not controlled
blink. no
automatic when the condition
ceases
u0
master not connected (on slave only)
the slave is released from the network and operates autonomously
blink. no
automatic when the condition
ceases
dx
slave x download failed(on master only)
blink. no
manual or automatic when
the condition ceases
(*) Nothing is displayed.
(**) A network alarm is an alarm propagated by the master to all the network devices, when so programmed, if the alarm relay is
activated on the master itself.
Under certain operating conditions, the signals listed on Tabella 8 are displayed.
