- 9 -
Fault trip
Note:
The indicator
remains on for 120s after one of the messages indicated above.
The fault
alternating with the
pool water temperature, does not block operation of the heat pump.
Display Designation
Cause
Remedy
Reset
Control sensor
fault
(ST1)
Sensor defective or
disconnected
Replace or reconnect the
sensor
Switch the power supply off and
then back on again or press the
key
if the message dSr is
blinking
Antifreeze sensor
fault
(ST2)
Sensor defective or
disconnected
Replace or reconnect the
sensor
Switch the power supply off and
then back on again or press the
key
if the message dSr is
blinking
Defrost sensor
fault
(ST3)
Sensor defective or
disconnected
Replace or reconnect the
sensor
Switch the power supply off and
then back on again or press the
key
if the message dSr is
blinking
Refrigerant circuit
low pressure fault
Insufficient refrigerant
Contact a PSA-approved
technician to detect the
leak and top up the
refrigerant
Automatic
(if less than 4 dbP or dHP
faults in one hour) or press the
key
if the message dSr is
blinking
Refrigerant circuit
high pressure fault
1- Turbulent air and water
flow through the unit
2- Excessive refrigerant
- Bleed the air from the
hydraulic circuit
2- Contact a PSA-
approved technician to
check the refrigerant
level
Automatic
(if less than 4 dbP or dHP
faults in one hour) or press the
key
if the message dSr is
blinking
(Alternating with the
pool water
temperature)
Water flow-rate
sensor fault
(ST4)
Sensor defective or
disconnected
Replace or reconnect the
sensor
Switch the power supply off and
then back on again or automatic
if the fault disappears.
Refrigerant circuit
pressure fault
High or low pressure fault
tripped while sensor ST4
detects fault Est4
Cancel the fault EST4
(see message above)
Automatic
(if less than 4 dbP or dHP
faults in one hour) or press the
key
if the message EST4 is
blinking
Defrost cycle time
exceeded
Defrost cycle too long (> one
hour)
This is due either to:
- excessive ice formation on
the evaporator (low
temperature with evaporator
blocked or no ventilation
during the defrost cycle).
- or an incorrect ST3 sensor
value.
Check possible using the
sensor reading function (see
box Display values of sensors
ST1-ST2-ST3 and ST4) see
page 10.
Cancel the fault , then
check that the defrost
cycle operates correctly.
In case of repeated fault:
Contact a PSA-approved
technician to check the
sensor ST3, as well as the
load of gas.
Switch the power supply off and
then back on again or press the
key
if the message dtd is
blinking (case after stand-by
following regulator start up by
pressing
)
EEPROM fault
(microprocessor)
The parameters data in the
controller chips are damaged
Contact a PSA-approved
technician to install a
new controller
Switch the power supply off and
then back on again
