Emerson ZX Platform Condensing Unit - ZXD Digital Scroll Controller Alarms; Alarm Modes and Set Points

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Alarm Messaging - Digital Scroll Controller (ZXD)
Alarm
Mode
Set Points Controller Actions Reset Remarks
dtL
DLT >= dtL after
dLd time delay
- Compressors are turned off Auto reset when DLT < dtL-dLH
DLT
E01L
Low pressure is lower
than ELP
(Level 3 Parameter)
- Compressors are turned off
- Fans are unchanged
Auto reset when LP >= ELP(Level 3)
LP
E0L
Mechanical LP
switch opens
- Compressors are turned off
- Fans are unchanged
Auto reset when Number of
activations < PEn in PEi time
LP
Manual reset when Number of
activations >= PEn in PEi time
- Press
key for 3 sec or
- Turn off and on the unit
LP
C-LA
LP < LAL
- Signaling only
Auto reset when LP = LAL + delta (0.3bar)
LP
C-HA
LP >= HAL
- Signaling only
Auto reset when LP = HAL -delta (0.3bar)
LP
E0H
Condensing Temperature
High
- Compressors are turned off -
Fans are turned on
Auto reset when Number of activations
< PEn in PEi time
Cond Mid Temp.
Manual reset when Number of activations
>= PEn in PEi time
- Press
key for 3 sec or - Turn off
and on the unit
Cond Mid
F-HA
HP >= HAF
- HFC = yes, compressor are
turned off
Auto reset when HAF + delta (0.3bar)
Cond Mid Temp.
P1
Suction Transducer
failure or out of range
- Compressors are activated
according to SPr or PoPr
Auto reset when probe is normal
LP
P2
Condenser Mid Coil
Sensor failure or out
of range
- Fans are activated according
to FPr
Auto reset when probe is normal
Cond Mid Temp.
P3
Discharge Temp Sensor
failure or out of range
-The functions related to No.3
probe are disabled
Auto reset when probe is normal
DLT
DLT: Discharge line temperature
LP : Low pressure
HP : High pressure