Emerson XM679 - Alarm Signals

24 • XM679K I&O Manual 026-1218 Rev 4
14 Alarm Signals
Message Cause Outputs
KEYBOARD
nod
No display: the keyboard is trying to
work with another board that is not
working or not present.
Press the UP arrow for three (3) seconds. Enter the SEC
menu, and select LOC entry.
PON Keyboard enabled Outputs unchanged
POF Keyboard locked Outputs unchanged
rst Alarm reset Alarm relay reset
nOP, nP, nA Probe not present Compressor output according to parameter Con and COF
noL
They keyboard is not able to 
communicate with the XM679K.
Verify the connection. Call the service.
ALARM FROM PROBE INPUT
P1 First probe failure Compressor output according to parameters Con and COF
P2 Second probe failure Defrost end is timed
P3 Third probe failure Outputs unchanged
P4 Fourth probe failure Outputs unchanged
P5 Fifth probe failure Outputs unchanged
P6 Sixth probe failure Outputs unchanged
PPF
PPF is displayed by slaves of pressure
that don’t receive the value of pressure.
The percentage of the valve opening is fixed at PEO value.
CPF
CPF is displayed when the remote
probe 4 is not working,
The percentage of the valve opening is fixed at PEO value.
TEMPERATURE ALARM
HA Maximum temperature alarm Outputs unchanged
LA Minimum temperature alarm Outputs unchanged
HAd Defrost high temperature Outputs unchanged
LAd Defrost low temperature Outputs unchanged
FAd Defrost low temperature Outputs unchanged
HAF Fan high temperature Outputs unchanged
LAF Fan high temperature Outputs unchanged
StP
Stop due to regulation pauses 
(Sti and Std parameters)
Compressor and valve OFF
DIGITAL INPUT ALARM
PAL Lock due to pressure switch All outputs OFF
dA Door open Compressor and fans restarts according to rrd and odc
EA External alarm Outputs unchanged
CA Serious external alarm (i1F=bAL) All outputs OFF
ELECTRONIC VALVE ALARM
LOP Minimum operating pressure reached According to dML
MOP Maximum operating pressure reached According to dML
Table 14-1 - Alarm Signals