English
35
SYSHRW
17.2. ALARM CODES
17.2.1. GENERAL CODES
17.2.2. COOLING MODE
FAULT
LED ALARM
CODE
POSSIBLE CAUSE
CORRECTIVE ACTION
ACTION FOR CANCELLING FAULT CODE
AFTER CORRECTION
Thermal fan
protection or phase
reversal
111000000
3 flashes
Three phase power supply phase reversal Reverse 2 phases
The fault code is automatically
cancelled after correction(***).
The LED stops flashing and the green
light remains on.
Clogged filters.
Clean the filters.
Lack of airflow.
Check the pressure losses on the air intake duct.
Broken wire at the level of the STORM2
circuit board or bad contact.
Rewire correctly (c.f. appliance wiring diagram)
Defective contact at the level of the phase
controller board.
Check the connections at the level of the phase
controller. Replace if defective.
Intake air temperature outside operating
limits.
Seized or damaged motor.
Check current draw. Replace motor if defective.
Condensate tray
overflow protection
111111110
8 flashes
Condensate drainage system blocked
Clean the condensates tray.
The fault code is automatically
cancelled after correction.
The LED stops flashing and the green
light remains on
Too high aeraulic pressure loss due to an
obstruction in the intake duct.
Test the aeraulic network pressure losses.
Completely clogged filters.
Clean or replace the filters.
The float is not properly connected to the
PCB, broken wire.
Check the connections.
RT sensor fault
111111111
9 flashes
RT, ICT, LWT sensor connection problem,
broken wire or short circuit.
Check the connections at the level of the PCB and/or
check for broken wires.
The fault code is automatically
cancelled after correction.
The LED stops flashing and the green
light remains on.
ICT sensor fault
1111111111
10 flashes
LWT sensor fault
11111111111
11 flashes
No alarm - unit ON
ON
No alarm - unit OFF
or on STAND-BY
OFF
FAULT
LED ALARM
CODE
POSSIBLE CAUSE
CORRECTIVE ACTION
ACTION FOR CANCELLING FAULT CODE
AFTER CORRECTION
High pressure or
water flow fault
100000000
1 flashe
Hot water loop temperature too high,
above 50°C.
Test the water temperature at the level of the main loop.
Cut the mains power supply for
5 seconds, and then reconnect.
Insufficient water flow or no water flow at
the level of the appliance.
Test the flow from the pump on the main loop.
Faulty pressure differential
Check electrical connections.
Pressostat defective, broken wire or short
circuit.
Check the proper connection of the HP pressostat.
Low pressure
110000000
2 flashes
Insufficient airflow.
Check proper fan operation.
The fault code is automatically
cancelled after correction(***).
The LED stops flashing and the green
light remains on.
Refrigerant leak.
Find and repair any leaks on the pipe circuits.
Clogged filters.
Clean or replace the filters
Pressostat defective, broken wire or short
circuit.
Check the proper connection of the LP pressostat and/or
conduct a continuity test.
Too high hydraulic pressure loss due to an
obstruction in the intake duct.
Check the aeraulic network.
Low water
temperature limit
111110000
5 flashes
Hot water loop temperature < 10°C
Test the temperature at the level of the main loop.
The fault code is automatically
cancelled after correction(***).
The LED stops flashing and the green
light remains on.
Bad connection of sensor to PCB or
defective sensor.
Test the connections.
Insufficient water flow.
Test the water flow at the level of the main loop.
High water
temperature limit
111111000
6 flashes
Hot water loop temperature > 50°C.
Test the temperature at the level of the loop.
The fault code is automatically
cancelled after correction(***).
The LED stops flashing and the green
light remains on.
Insufficient water flow.
Test the water flow at the level of the main loop.
Anti-freeze protection
111111100
7 flashes
Insufficient airflow.
Test fan operation and pressure losses on the air intake
duct network.
The fault code is automatically
cancelled after correction.
The LED stops flashing and the green
light remains on.
Clogged filters.
Clean or replace.
Refrigerant leak.
Find and repair any leaks on the pipe circuits.
Return air temperature too low
Outside operating limits.
