11 Alarms and Messages of UA 400
The following table lists all fault reports that may be generated and their possible cause. Each fault is assigned
aprioritythatcanbesetintheAlarmPrioritiesscreen.
No. Message Cause Correction
Hardware faults
4 EEPROM Fault Component for saving configuration defective or
configuration data in EEPROM implausible.
Save parameters in LDSWin software,
perform first start if necessary and load
parameters from LDSWin. Contact Service
Organization if fault recurs
6 Flash Fault Flash memory module defective. Please contact Service Organization -Replace
device
8 RTC Fault Real-time clock defective. Please contact Service Organization -Replace
device
10 Battery Voltage Real-time clock and RAM backup battery dead Replace battery (see chapter UA 400
installation and start-up)
50 First Start Controller performed first start (basic settings
loaded).
-
51 Power Failure Controller performed restart after power outage. -
120 Low Temp. Zone 1 Temperature below lower limit on monitored
control sensors of Zone 1.
Check parameter setting, sensors, system
121 Low Temp. Zone 2 Temperature below lower limit on monitored
control sensors of Zone 2.
Check parameter setting, sensors, system
122 High Temp. Zone 1 Temperature above upper limit on monitored
control sensors of Zone 1.
Check parameter setting, sensors, system
123 High Temp. Zone 2 Temperature above upper limit on monitored
control sensors of Zone 2.
Check parameter setting, sensors, system
124 Door open
Door open Z1/Z2
Cold-room controllers only: Cold-room door i.e.
Cold-room Z1 or Z2 open beyond alarm interval 1
Close door, check door switch or connecting
cable
125 No Defrost Defrosting not performed within alarm interval.- A
defrost sequence via CAN bus was not correctly
configured- A master/slave defrost via CAN bus
was not correctly configured
Check parameterization: Check the internal/
external defrost timer, defrost times, alarm
delay time, configuration of the master/slave
defrost via CAN bus (see chapter Master-
Slave-Modus - Abtau-Synchronisation über
CAN-Bus), check the configuration of the
defrost sequence via CAN bus (see chapter
Folgeabtauung (FA) über CAN-Bus).
126 Timer-Term. Defrost Defrosting terminated by safe defrost time. Heater
defective, contactor defective, evaporator iced.
Check parameter settings: Defrost termination
temperature too low, check evaporator for
icing, check location of defrost sensor, set
defrost termination temperature to "--"
Defrosting is always terminated by safe
defrost time on controllers working with
off-cycle defrosting. Alarm may be
displayed at intervals on these
controllers
without an actual fault occurring.