AERMEC micro chiller 2 Manuel D'utilisation page 19

Signalling of specific unit operating condi-
tions or an alarm condition, are by the micro
chiller controller, through codified messa-
ges appearing on the display; to de-codify
Code Cause
High pressure
HP1
LP1 Low pressure
General thermal
TP
Flow state
FL
Probe alarm
E1, E2, E3
E4 Compensation probe alarm
EEPROM error
EPr
EPb EEPROM error when starting up
Defrosting ends for maximum time limit
dF1
Defrosting in progress
d1
A1 Anti-frost alarm
Low feeding power
ELS
EHS High unit feed tension
ALARM RESETTING
When the alarms stop through automatic resetting or by pressing
for five seconds for manual resetting, the following take place:
• Alarm relay deactivates.
• Temperature stops flashing on the display.
• The alarm code is no longer shown on the display.
If the alarm continues, the alarm signalling procedure is repeated.
Alarms
those messages, use the table below. When
an alarm occurs, the following actions are
usually taken:
• Alarm relay comes on
Turn the compressor off immediately, alarm relays and display flashing come on. Fans are activated at maxi-
mum speed for 60 s, to contrast the alarm situation then they are turned off. Heat pumps can indicate inter-
vention of thermal compressor protection. Resetting is manual.
The alarm turns the compressor off immediately or does not turn it on; alarm relays and display flashing
come on. Resetting is automatic.
Alarm is heard independently of pump and compressor state. It turns compressors, pumps and fans off,
(without observing protection times) and does not permit start-up; alarm relay and display flashing come on
with relative message and LED. Resetting is both automatic or manual.
Alarm turns pump, compressor and fans off, display starts flashing and alarm relay comes on . Resetting is
manual.
A probe alarm deactivates compressor, fans and pump; alarm relay and flashing display come on. Resetting
is automatic.
E1: Water inlet probe
E2 : Water outlet probe
E3 : Battery probe
A probe alarm deactivates compressor, fans and pump; alarm relay and flashing display come on. Resetting
is automatic.
A problem with the machine's non volatile memory (eeprom). If it is EPr, the unit carries on working till first
power stop. When power comes back, if the error is still there the display starts flashing the words EPb and
the unit does not start; resetting is automatic.
If defrosting ends due to maximum time when the selected end was temperature threshold reached or
external contact, the machines displays the initials dF1. The message can be turned off through the alarm
cancellation procedure or by doing another correct defrosting cycle. Alarm relay does not come on.
During defrosting, the machine displays alternately the message d1 and temperature
The alarm is through the evaporator water outlet probe evaporatore (SUW). The alarm turns compressor
and fans off immediately and alarm relay and flashing display come on. Resetting is manual.
If feeding power is too low or too high, the message ELS or EHS appears not guaranteeing correct EHS
functioning.
and
• Temperature flashing on the display
• Display showing an alarm code alternated
with temperature
Description
at the same time
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