Alarm Signals; Silencing Buzzer/Alarm Relay Output; Alarm Recovery; Other Messages - Emerson XR75CX Installation And Operation Manual

14 Alarm Signals

Message Cause
P1 Room probe failure
P2 Evaporator probe
failure
P3 Third probe failure
P4 Fourth probe failure
HA Maximum tempera-
ture alarm
LA Minimum tempera-
ture alarm
HA2 Condenser high tem-
perature
LA2 Condenser low tem-
perature
dA Door open
EA External alarm
CA Serious external
alarm (i1F=bAL)
CA Pressure switch alarm
(i1F=PAL)
rtc Real time clock alarm
rtF Real time clock board
failure
Table 14-1 - Alarm Signals
14.1. Silencing Buzzer/Alarm
Relay Output
If tbA = y, the buzzer and the relay are is silenced
by pressing any key.
If tbA = n, only the buzzer is silenced while the
alarm relay is ON until the alarm condition recovers.

Silencing Buzzer/Alarm Relay Output

Outputs
Compressor output acc.
to par. Con and CoF
Defrost end is timed
Outputs unchanged
Outputs unchanged
Outputs unchanged
Outputs unchanged
It depends on the Ac2
parameter
It depends on the bLL
parameter
Compressor and fans re-
start
Output unchanged
All outputs OFF
All outputs OFF
Alarm output ON; Other
outputs unchanged; De-
frosts according to par.
IdF Set real time clock
has to be set
Alarm output ON; Other
outputs unchanged; De-
frosts according to par.
IdF Contact the service

14.2. Alarm Recovery

Probe alarms P1, P2, P3, and P4 start some sec-
onds after the fault in the related probe; they automat-
ically stop some seconds after the probe restarts
normal operation. Check connections before replac-
ing the probe. Temperature alarms HA, LA, HA2,
and LA2 automatically stop as soon as the tempera-
ture returns to normal values.
Alarms EA and CA (with i1F = bAL) recover as
soon as the digital input is disabled.
Alarm CA (with i1F = PAL) recovers only by
switching OFF and ON the device.

14.3. Other Messages

Message
Pon Keyboard unlocked
PoF Keyboard locked
noP In programming mode:
No parameter is present
In Pr1 on the display or in dP2, dP3, dP4:
The selected probe is not enabled
Table 14-2 - Additional Display Messages
Output
Alarm Signals • 19