16
7TROUBLESHOOTING
7.1 POSSIBLE FAULTS & SOLUTIONS
Problem
Possible cause
Solution
Boiler willnotstart
No power to boiler.
Check incoming power supply.
No power.
Check boiler control switch is on.
(See Section 6.1.)
Heating overheat. Switch tripped.
Locate switch and reset. (See
Section 7.2)
DHWOverheat switch tripped.
Locate switch and reset. (See
Section 7.2)
DHW tank empty.
Open a hot water tap until the
water flows.
Fault E1 displayed
Heating flow temperature sensor
Heating water out temperature
probe defective.
ContactTechnicalService
Fault E2 displayed
Heating return temperature sensor
Heating water return temperature
probe defective.
ContactTechnicalService
Fault E3 displayed
Heating system water flow switch
Low heating system pressure.
Check for leaks.
Refill heating system to 1.5 bar.
Fault E3 continued
Pumpnotturning.
Check rotating freely (sect 5.3)
Replace pump if necessary.
Fault E3 continued
Air in system.
Purge thoroughly.
Check automatic air valve open.
Ventpump (sect5.3)
Fault E3 continued
System resistance too high or
blockage.
Check pump speed 3.
Check pump duty (sect 4.9)
Open all radiator valves.
Install system by-pass.
Fault E5 displayed
Error in configuration for maximum
heat output.
Check correct configuration (See
Section 5.1)
Fault E6 displayed
DHW temperature sensor
Defective DHW tank temperature
sensor.
Check connections. Replace sensor
if necessary.
Heating system water
discharging from 3 bar safety
valve
Excessive heating system pressure.
Check filling loop not passing and
remove.
Check expansion vessel is charged
with air.
Check system expansion volume.
Domestic water discharging
from 7 bar valve
Excessive pressure in domestic
water system.
Check incoming mains pressure is
below 5 bar.
Fit pressure reducing valve.
Check 2L expansion vessel charged
with air.
The buttons do not respond
Control panel blocked
See Section 10.2 BLOCKING THE
CONTROLS
Low heating temperature
Settingstoolow.
Check temperatura & output
selected.
Failure of heating elements
Check and replace.
Heat requirements miscalculated.
Re-calculate& configure.
If the suggested action fails to resolve a problem please contact ELNUR technical service for further
advice.
Содержание CM15BG
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