Servicing Manual
17
THE
MAINTENANCE
OPERATIONS
DESCRIBED IN THIS MANUAL MUST BE
CARRIED
OUT
BY
QUALIFIED
PERSONNEL ONLY, IN COMPLIANCE
WITH
THE
ELECTRICAL
SAFETY
STANDARDS IN FORCE.
ONLY
USE
ORIGINAL
OR
RECOMMENDED SPARE PARTS.
3.1 CHECKING THE SUPPLY VOLTAGE
The supply voltage must match with the rated
voltage indicated on the data plate. The actual
input voltage must be within -15% and + 10% of
the rated voltage for good and safe operation.
•
Measure the mains voltage, inserting the
multimeter tips into the electrical socket and
compare it with the rated voltage written on
the data plate.
If no voltage is found :
•
Check the electrical system fuse(s) and the
main distribution board.
•
Check the electrical socket.
Note : Only carry out maintenance/repairs on the
heater and not on the electrical system, for which
servicing by authorized personnel is required.
3.2 CHECKING AND REPLACING THE
POWER CORD
.
•
Check that the green warning lamp lights up.
If it does not, this means the heater is not
powered.
•
Check the conditions of cable and plug and
look for damages and failures.
•
Unscrew the fixing screws of the control panel
and extract the electrical board.
Ill. 6
•
Unscrew the fixing screw of the resin board
cover and remove the cover.
Ill. 7
•
Check voltage between mains terminals (live
and neutral) on the cable strain relief. If no
voltage is found, check the fuse. If it is
damaged or burnt, replace it with one with
same current ratings (“slow-blow” type)
Ill. 8
