Specifications

Maintenance and service | 35
6 720 644 936 (2013/01)830 ES
6.6 Operation
▶ When a hot water tap is opened, main burner ignites and LCD displays
indication .
Fig. 57
▶ LCD flashes until selected temperature is reached.
▶ Power bar indicates power percentage in use.
6.7 Reset button
If the LCD shows the error symbol do not shut off power or unplug
the heater. Follow instructions below to reset error first.
Record the error code on LCD and consult “Problem solving” chapter
9.1, page 42.
Fig. 58
After following instructions indicated in “Troubleshooting” section,
▶ press reset button firmly in order to return heater to normal
operation.
Fig. 59 Reset button
If the problem persists, contact your installer.
6.8 Program button
Fig. 60 “Program” key
6.8.1 Memorizing selected temperature
▶ Press buttons or to select desired temperature.
▶ Hold “Program” button for 3 seconds to save temperature.
When LCD stops blinking, temperature is saved in memory.
Using “Program” function
In order to select memorized temperature
▶ Press “Program” key.
LCD shows pre-memorized temperature, which is now the hot water
selected temperature.
6.9 Locked condition
This condition is only valid for appliances with one or more remote
controls installed.
Fig. 61 Locked condition
Whenever LCD shows , the temperature setting cannot be
adjusted because the appliance is in use by a user which already
selected a different temperature. Appliance will be automatically unlock
5 minutes after closing hot water tap.
7 Maintenance and service
7.1 Annual maintenance
(To remove front cover, see page 8.)
Venting System
• Venting system - inspect inside of flue pipe for any blockage or
restriction. Observe burner flames during heater operation. (front
cover must be removed). Inspect the combustion air inlet pipe for
blockage or debris. Inspect combustion air and exhaust terminations
for blockage or debris
Combustion Chamber
• Inspect burner observation window (Fig.71, #14) for cracks or
spillage of flue gases. Observe burner flames during heater operation.
Flames should be steady and blue with no signs of yellowing. Yellow
burner flames are an indication of improper combustion. Refer to
+
DANGER:
▶ Always shut off the electrical power supply, shut off
the manual gas valve and shut off the water valves
whenever servicing.
NOTICE:
▶ Inspect and clean the complete water heating system
once a year.
▶ Carry out a maintenance as necessary. Immediately
repair all faults to avoid damage to the system.
Annual maintenance table
Every year
1. Inspect venting system X
2. Inspect combustion chamber X
3. Inspect burner X
4. Inspect condensate trap X
5. Inspect water filter X
Table 34 Annual maintenance