Compact Condens : A1003043 - 664Y7200 • A
en
34
EN
FR
NL
ES
IT
DE
PL
RU
TROUBLESHOOTING
GENERAL
Problem
Probable cause(s)
Solution(s)
1. No data visible on the display
On/Off Master switch on “O” position
Place On/Off Master switch on “ I “ position
Fuse (5,0 AT) in the control panel blown
THIS FUSE IS PART OF THE 230 V CIRCUIT. SO FIRST SWITCH OFF FROM THE MAIN !
Check fuse - Replace as required
230 VAC tension
Connect the boiler to the power supply
Check if there is 230 VAC tension on the connections “L” and “N” of connector X1 in the MAXSYS (see “Wiring Diagram and Electrical Connections”
on page 18).
If there is tension, replace 230 V fuses F1 and F2 inside the Maxsys (no need to remove MAXsys controller from panel, just release the 6 clips with
a screwdriver to remove the cover).
Check flat cable of the display.
If it is OK, replace MAXSys controller
2. Blown fuse F1 2 AF inside the
Maxsys
Short-circuited pump
Check wiring of CH pump and DHW pump if any. Replace faulty pump if required.
3. Data visible on the display, but
no boiler activity
Fuse F3 4 AT inside the Maxsys is blown
Check fuse and replace as required
No heat demand generated
Generate a heat demand :
•
Through the
Diagnostics menu/manual test
, set the boiler to a fixed fan speed between minimum and maximum CH-fanspeed.
•
At heat demand, the boiler control will perform zero-check of air pressure switch before starting the fan. After that the fan will start and
wait for air pressure switch to close. As soon as air pressure switch has closed (ΔP>40 Pa), starting procedure will continue.
4. Error code shown on display
Refer to “Errors (hard and soft lockouts)” on page 35 and section “Locking Codes” on page 36.
CH CIRCUIT
Problem
Probable cause(s)
Solution(s)
5. CH circuit remains cold
Faulty power supply
Refer to problem 1 above
CH operation OFF
Activate CH operation through control panel. Refer to “Installer’s menu and parameter descriptions” on page 12
Faulty room thermostat
Check wiring connection, refer to “Wiring Diagram and Electrical Connections” on page 18
If connection is correct, replace thermostat
CH preset temp too low
Change CH setting through control panel
Faulty Outdoor temperature sensor
Check wiring connection, refer to “Wiring Diagram and Electrical Connections” on page 18
If connection is correct, replace Outdoor temperature sensor
Faulty 3-way valve faulty
Check that 3-way valve is not stuck on the DHW circuit. Release or replace as required.
