51
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 pumps)
Pressing the SEL and UP keys simultaneously for 5 seconds
activates forced defrost of the unit.
Clearing hour counters
While reading compressor or pump (c10 and c15) operating
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
starts and stops 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, and /16, See Parameters related to probes table.
Remote ON/OFF
A remote ON/OFF intake can be connected between termi-
nals D5 and B of 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 function does not disable the ON/OFF function
of the keyboard.
Remote COOL/HEAT
A remote COOL/HEAT intake can be connected between
terminals D2 and B of 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 does not disable the COOL/
HEAT function of the keyboard.
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
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
Problem at fan voltage control
Automatic
FL
Flow switch / Pump switch
Manual
Hc
Compressor maintenance alarm
Automatic
HP
High pressure / Fan heat switch
Manual
Ht
High water temperature alarm
Automatic
L
Low charge warning
Automatic
LP
Low pressure
Manual
