Airedale Ultima Compact Condensing Unit 30kW - 450kW - Manual (Page 27)

Condensing Units ULTIMA COMPACT
Condensers & Condensing Units
27
Installation & Maintenance : 6259675 IM V1.4.0 10/2013
Chill
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ULT
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- Controls
ALARMS The controller logs and allows viewing of the last 100 conditions recorded in descending
chronological order.
13/05/02 11:32
Event number 001
Alarm Active
37-Diff Pressr Evap
Alarm Handling
1 A Red LED behind the Alarm key will light in the event of an alarm. To view
the alarms, simply press the key and the keys to scroll through.
2
Auto reset alarms will clear following this first depression of the Alarm key. If
however the Red LED behind the Alarm key remains illuminated, the unit
requires some form of manual reset.
3 For manual reset alarms, isolate the affected circuits before further investigation.
4 To reset or delete the alarms displayed in the alarm screen, simply press
again.
COMMON ALARMS Outlined below is a selection of Common Alarms, a full list is available, please
contact Airedale.
Phase Rotation
(Optional) A normally closed contact. When Phase Rotation is incorrect all controller outputs are
de-activated.
Emergency Stop A normally open contact. On closing, all controller outputs are de-activated.
INDIVIDUAL CIRCUIT
ALARMS Outlined below is a selection of Individual Circuit Alarms, a full list is available, please
contact Airedale.
Low Suction Pressure When the suction pressure sensor value falls below the value set by the low suction level
for a period exceeding 1 minute (or 3 minutes on compressor start-up), a visual alarm will
be generated at the in-built display and the relevant compressor will be de-activated. On
units with tandem compressors, both compressors from the same circuit will be
switched off.
High Liquid Pressure When the liquid pressure reaches 25 BarG, the relevant circuit will be switched off and an
alarm activated, this can only be rectified by manual reset via the microprocessor.
Compressor Status A normally closed contact when the compressor is operating. If this contact remains open
for a period of 3 seconds during operation of the compressor, a visual alarm is generated
and the relevant compressor will be de-activated. This alarm comprises of compressor
motor protection module, discharge gas thermostat and safety high pressure switch.