USER MANUAL CENTRAL HEATING BOILER TYPE C38GC25; C38GC25-P; C38GC29; C38GC35; C38GC35-CH1; C38GC35-CH2
REV. 01.07.2019
27 din 37
8.2
Maintenance works
For keeping the product in perfect state of work, the following maintenance steps must be followed:
Tab.8.1Work stages for maintenance work
No.
Work stage
To be done:
General
(each 2 year)
On demand
1.
Disconnect from the electric grid and turn off gas power supply
•
2.
Turn off installation connecting taps; gas boiler de-pressurizing and emptying, if
necessary.
•
3.
Check and cleaning of the main heating switch
•
4.
Check the lighting/ ionizing electrode
•
5.
Check pressure in the expansion vessel
•
6.
Check the sieves on the cold water input circuit and thermal output circuit
•
7.
Check connections
•
8.
Check and clean the condensate trap
•
9.
Check safety elements
•
10.
Check electric connections
•
11.
Check pipes and gas valve tightness
•
12.
Check the gas valve closing function
•
13.
Check gas evacuation installation
•
14.
Check adjustment devices (ambient thermostat, exterior sensor) if the case may be
•
9
Error signals
Possible errors of the system are indicated by the following codes which appear on the display.
Meaning of error signals which appear on the display:
Code
Class
Non-
Volatile
Meaning
Resetting mode
E01
C
YES
-the quality of the power supply is not in the parameters;
- the connection between the electronic board and the power
outlet is not correct, generating imperfect contacts.
AUTORESET to the
disappearance of cause
E02
C
NO
- failure of the electronic board due to electromagnetic
interference on the external power supply system of the boiler.
On the same electric circuit with the boiler there are consumers
generating such interference: washing machine, conditioner air
conditioners or other appliances.
- failure of the electronic board due to excessive humidity inside
the electronic box (the environmental conditions for the boiler
installation are not observed).
AUTORESET to the
disappearance of cause
E04
C
NO
-breaking the ribbon cable between the electronic board and
the display;
- keys on the display locked (manually or mechanically locked
under the display sheet). Any key pressed for more than 17
seconds displays the display E04.
AUTORESET to the
disappearance of cause
E06
C
NO
- Frequent resetting of the electronic board. In 3 hours more than
75 self-resetting, due to the fact that the power supply is not in
the parameters.
Manual reset from RESET button
E07
N
NO
- EEPROM manufacturer and/or installer parameters corrupted
due to inadequate communication between processors.
Manual reset from RESET button
E08
C
YES
- EEPROM installer parameter corrupted due to an incorrect
connection on the 230Vac supply circuit between the electronic
board and the power supply or other field element, powered by
230Vac, in the boiler.
Manual reset from RESET button
E10
N
NO
- water pressure in the system is less than 0.8 bar (due to the
heating system);
- water pressure in the system is higher than 3.5 bar (due to the
heating system);
- pressure sensor supply cable with imperfect or interrupted
contact;
- wrong pressure sensor signal (decalibration).
AUTORESET to the
disappearance of cause
E11
N
YES
The rapid increase in output water temperature (low flow or
pump lock - the option with flow switch)
AUTORESET to the
disappearance of cause
E13
N
NO
The turn / return temperature difference too high, caused by: air
in the installation; CH flow too low; low installation pressure;
temperature sensor defective.
AUTORESET to the
disappearance of cause
