100
ENG
µchiller +0300053EN rel. 2.2 - 14.12.2021
Alarms and signals
300053_122_R01
Pressing the Alarm button for more
than 3 s resets the alarms: noAL indi-
cates that there are no more active
alarms. Press PRG to exit the alarm list.
A single alarm can be reset by pressing Alarm for more than 3 s. If the condition that generated the alarm is still present, the
alarm will be reactivated. The alarm log can be deleted using parameter ClrH, accessible via the Service level on the terminal or
APPLICA via smartphone, with BLE connection, using the specifi c function on the alarm page ("Service" level access). The same
operations can be performed with APPLICA via smartphone, using the specifi c function on the alarm page (a BLE connection
and "Service" level access are required).
Notes:
• deletion of the alarm log is irreversible;
• See chapter “Functions” for the alarm parameters: evaporator outlet temperature, frost protection, compressor;
• the buzzer is activated for all alarms.
8.2 Alarm list
Code Description Reset E ect Priority Delay
No. of
attempts
Evaluation
period (s)
A01 Unit: no. of permanent memory writes M - Fault No - -
A02 Unit: permanent memory writes M - Fault No - -
A03 Unit: remote alarm from digital input M Unit shutdown Serious, unit No - -
A04 Unit: remote set point probe A Use standard
set point
Fault 10s - -
A05 Unit: user return water temperature probe A Unit shutdown Fault 10s - -
A06 Unit: user delivery water temperature probe A Unit shutdown Serious, unit 10s - -
A08 Unit: user pump 1 overload M - Fault No - -
A09 Unit: user pump 2 overload M - Fault No - -
A10 Unit: fl ow switch (with user pump 1 active) M Unit shutdown Serious, unit Param.
U045/U046
--
A11 Unit: fl ow switch (with user pump 2 active) M Unit shutdown Serious, unit Param.
U045/U046
--
A12 Unit: user pump group M Unit shutdown Serious, unit No - -
A13 Unit: user pump 1 maintenance A Fault Param. U000 - -
A14 Unit: user pump 2 maintenance A - Fault Param. U003 - -
A15 Unit: high chilled water temperature A - Fault Param.
U032/U033
--
A16 Unit: source return water/air temperature probe A Disable FC and
Compensation
(A/W units)
Fault 10s - -
A17 Unit: source pump 1 maintenance A - Fault Param. S000 - -
A18 Unit: free cooling warning M Disable FC Fault Param.
U032/180s
--
A19 Circuit 1: condensation pressure probe A Circuit 1 shutdown Serious, circuit 1 10s - -
A20 Circuit 1: condensing temperature probe A Circuit 1 shutdown Serious, circuit 1 10s - -
A21 Circuit 1: evaporation pressure probe A Circuit 1 shutdown Serious, circuit 1 10s - -
A22 Circuit 1: evaporation temperature probe A Circuit 1 shutdown Serious, circuit 1 10s - -
A23 Circuit 1: discharge temperature probe A Circuit 1 shutdown Serious, circuit 1 10s - -
A24 Circuit 1: suction temperature probe A Circuit 1 shutdown Serious, circuit 1 10s - -
A25 Circuit 1: high pressure switch Param
U081.
Circuit 1 shutdown Serious, circuit 1 No - -
A26 Circuit 1: high condensing pressure/temperature
transducer
M Circuit 1 shutdown Serious, circuit 1 No - -
A27 Circuit 1: low pressure transducer A (R) Circuit 1 shutdown Serious, circuit 1 No 3 3600
A28 Circuit 1: frost protection evaporation temperature Param.
U081
Circuit 1 shutdown Serious, circuit 1 Param. U052 - -
A29 Circuit 1: compressor 1 overload Param.
U081
Circuit 1 shutdown Serious, circuit 1 Param.
C049, C050
3 3600
A30 Circuit 1: compressor 2 overload M Comp. 1 circ.
1 shutdown
Fault, circuit 1 No - -
A31 Circuit 1: compressor 1 maintenance M Comp. 2 circ.
1 shutdown
Fault, circuit 1 No - -
A32 Circuit 1: compressor 2 maintenance A - Fault, circuit 1 Param. C000 - -
A33 Circuit 1: source fan maintenance A - Fault, circuit 1 Param. C003 - -
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