Technical information

90
Table of alarms
Display Alarm type Reset
A1
Antifreeze alarm Manual
AHt
High temp. at start-up (if activated, P20=1) Automatic
ALt
Low temp. at start-up (if activated, P20=1) Automatic
d1-2
Defrost in operation -
dF1-2
Problem in defrost Automatic
E1
Probe B1 Automatic
E2
Probe B2 Automatic
E3
Probe B3 Automatic
E4
Probe B4 Automatic
E8
Probe B8 Automatic
ELS
Low supply voltage Automatic
EHS
High supply voltage Automatic
EPr
Eprom error. Unit in operation. Automatic
EPb
Eprom error. At start-up Automatic
ESP
Communication failure with expansion module Automatic
EL 1-2
Problem at fan voltage control Automatic
FL
Flow switch Manual
Hc1/Hc2
Compressor maintenance alarm Automatic
HP1/HP2
High pressure Manual
Ht
High water temperature alarm Automatic
LP1/LP2
Low pressure Manual
PC1
Partialization of compressors (high pressure) Automatic
tC1
Fan thermal protectors Automatic
TP
Phase order failure/phase failure Manual
Reset of alarms
Pressing the UP and DOWN keys for 5 seconds cancels
alarms present in the memory. At the same time, the alarm
message disappears from the display and the alarm relay
is deactivated.
Forced defrost (heat pump)
Pressing the SEL and UP keys for 5 seconds activates forced
defrost of the unit.
Clearing hour counters
While reading compressor or pump (c10, c11 and c15) op-
erating hours, said counters can be cleared by pressing the
UP and DOWN keys simultaneously.
Pump operation
4 operating modes can be selected in accordance with the
value given to parameter H5. H5=0 (pump disabled), H5=1
(pump permanently on), H5=2 (pump ON controlled by the
regulator or in parallel with the compressor), H5=3 (pump
goes on and off at regular intervals, independent of compres-
sor operation) (parameters c17 and c18).
Calibration of probes
If necessary, probes can be calibrated by using parameters
/13, /14, /15, /16, /19 and /20. See Parameters related to
probes table.
Remote ON/OFF
A remote ON/OFF intake can be connected between termi-
nals D5 and B on the connecting strip. To activate said intake,
a value of 1 should be given to parameter H07 (H07= 1).
With this intake open the unit is OFF; when closed, the unit
is ON. This option does not disable the ON/OFF function of
the keyboard.
Remote COOL/HEAT
A remote COOL/HEAT intake can be connected between
terminals D1 and B on the connecting strip. To activate said
intake, a value of 1 should be given to parameter H06 (H06=
1). With this intake open the unit is in HEAT; when closed,
the unit is in COOL.
This function disables the HEAT/COOL function of the key-
board.
Partialization of compressors in (HP Prevent) high pres-
sure
This function is activated if P04 = 1. If for any reason the
high pressure is near the disconnecting point (P18-0.5 bar),
this control deactivates one of the compressors and waits
10 seconds.
After this interval, if the alarm persists, the unit is turned
off. If, on the other hand, the alarm disappears, the unit will
continue to operate with one single compressor. In this situ-
ation, the message PC1 appears on screen. This condition
will remain activated until the pressure drops below the F5
+ F6 value.
In this case, the unit recovers the previously deactivated
compressor.