ISU-597:2014/GT-T
30.09.2016
12
4.4 Diagnostics
If there appears a failure in water heater’s performance, it will be signaled by displaying the proper error code on the
control panel. Error codes are being displayed with the priority of their importance for the safety of use.
If the symbols E1, E2, E3 or E6 flash, it is a signal that the water heater has been switched in safety mode. This lock status
may be cancelled by turning on a water tap. If despite of this the water heater is still blocked it is necessary to contact service
team.
Error code
Description
Lack of flame
If the Lack of flame is detected then gas Valle will be closed and water heater is Stopped for 30s (E1 is being displayed permanently).
After 30 s the control system actuate the water heater. After 3 ignition trials (2 trials for LPG) the water heater will be blocked. (It is
signalled with a flashing E1 error code displayed on LCD, what means that the water heater has been switched off in safety mode)
Electric supply cables improperly connected
The control of the water heater must be connect to a power source. If L and N cables are improperly connected, the control
system is not able to detect a flame and it make an ignition trial until the water heater switches off in a safety mode. You will see
E1 error code on the LCD.
In such a case it s necessary to change L and N cobles in the socket. The water heater will switch on after it detects it is properly
connected.
Water temperature In a heat exchanger exceeded 95
o
C.
Gas valve is made closed – the heat process is stopped (You will see flashing E2 error code on LCD, what means that the water heater
has been switched off in safety mode)
Lack of pressure difference in a chimney system or there is a brake in differentia pressure switch’s circuit
If a pressure difference between inlet air and outlet flue is not appropriate or there is no pressure difference, then:
•
the gas valve is shut down,
•
E3 error code is being displayed on LCD
•
15 s – time needed to short contacts of a differential pressure switch
•
If after 15 s the contacts are still open, the water heater will be switched off in safety mode.
•
You will see flashing E3 error code on LCD
Damage In NTC temperature sensor’s circuit:
•
the gas valve is shut down and a heat process is stopped
•
E4 error code is being displayed permanently on LCD
•
After removing the error reason the water heater will automatically return to its normal operation
Damage in an electric system of control unit:
(You will see flashing E6 error code on LCD, what means that the water heater has been switched off in safety mode)
Fault in gas unit’s modulator system
•
The water heater operates at its minimal output
•
E7 error code is being displayed permanently on LCD
•
After removing the error reason the water heater will automatically return to its normal operation
4.5 Switching off the heater
In case of an anticipated long break in the heater operation disconnect the water heater from electric supply and close
gas valve on the heater or on a gas cylinder (if applicable)
If a room where the water heater is installed is exposed to temperatures below 0ºC, it is necessary to drain the heater
out of water.
In order to do this, cut off cold water supply, then undone a nut on the pipe supplying the water into the water unit and
turn on the hot water tap.
5. ADAPTING THE WATER HEATER TO COMBUSTING DIFFERENT TYPE OF GAS
Adaptation of heater to another type of gas can be performed
only by AUTHORIZED SERVICE COMPANY.
NOTE!
Heater supplied by the manufacturer, is suitable for gas shown on the nameplate.
If you need to connect the device to a different type of gas than the type for which the device has been pre-equipped, check what type of gas can be
adapted.
Gases to which you can adjust the heater, are given on the nameplate-in the category of the device:
Category: II
2E 3P
II
2E 3B/P
II
2H 3P
II
2H 3B/P
II
2H 3B
II
2H 3+
Family 2 – natural gases:
2E-G20-13mbar
2E-G20-20mba
2H-G20-20mbar
2H-G20-25mbar
Family 3 – liquefied gases:
3P-G31-37mbar
3P-G31-50mbar
3B/P-G30-30mbar
3B/P-G30-37mbar
3B/P-G30-50mbar
3B-G30-28-30mbar
3B-G30-50mbar
3+-G30/G31-28-30/37mbar
water heater is designed to
combustion of gas from two
families
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