Technical information

63
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 protector Manual
Hc
Compressor maintenance alarm Automatic
HP
High pressure/Thermal fan protector Manual
Ht
High water temperature alarm Automatic
L
Low charge alarm -
LP
Low pressure 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 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
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, 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 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 D2 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 COOL/HEAT
function of the keyboard.