16
7 TROUBLESHOOTING
7.1 POSSIBLE FAULTS & SOLUTIONS
Problem Possible
cause
Solution
Boiler will not start
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)
Fault E1 displayed
Heating flow temperature sensor
Heating water out temperature
probe defective.
Contact Technical Service
Fault E2 displayed
Heating return temperature sensor
Heating water return
temperature probe defective.
Contact Technical Service
Fault E3 displayed
Heating system water flow switch
Low heating system pressure.
Check for leaks.
Refill heating system to 1.5 bar.
Pump not turning.
Check rotating freely (sect 5.5)
Replace pump if necessary.
Air in system.
Purge thoroughly.
Check automatic air valve open.
Vent pump (sect 5.5)
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 E8 displayed
Outdoor temperature sensor
Defective outdoor temperature
sensor or not present.
This sensor is optional. 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 to
correct level with air.
Check system expansion volume.
The buttons do not respond
Control panel blocked
See Section 6.8 BLOCKING THE
CONTROLS
Low heating temperature
Settings too low.
Check temperature & 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.
Summary of Contents for MATTIRA MAS18
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