Enertech Nu-Way Manuale del proprietario

FAULT FINDING

Fault Possible Cause Remedy

1. Combustion air fan does not start a) No air pressure in duct (positive or negative) a) Switch on main duct fan

b) Combustion air switch set too low b) Reset switch

c) Duct air switch set too high c) Reset Switch

d) If low gas pressure switch fitted, gas pressure too

low or switch set too high d) Adjust gas pressure or reset switch

e) If high gas pressure switch fitted, gas pressure

too high or switch set too low e) Decrease gas pressure or reset switch

2. Combustion air fan starts, but burner goes to

Lockout a) Combustion air switch set too high a) Reset switch

b) Incorrect fan rotation b) Correct

c) Fan blades dirty c) Clean fan

3. No spark. Burner goes to lockout. a) High tension lead not properly tightened at

terminations a) Tighten lead ends

b) Spark plugs not properly adjusted b) Adjust as necessary

c) Transformer failed c) Change transformer

4. Pilot does not light a) No gas a) Find cause and rectify

b) Too much gas b) Adjust gas pilot cock

c) Pilot valve not opened c) Change valve or find open circuit

5. Pilot lights but burner goes to ‘lockout’ Flame not detected because:

a) UV cell not looking at flame a) Re-align cell

b) UV cell faulty b) Check output. Change cell

c) Flame probe not in flame c) Rectify

d) Bad earth d) Check output of probe. Make good earth

connection

Page 1/2

FAULT FINDING (cont…)

Fault Possible Cause Remedy

6. Pilot alight, no main flame, burner goes to lockout a) Main valves not opening a) Check main valves

7. Main flame goes out after lighting a) Low gas pressure switch (if fitted) set too high a) Reset pressure switch

b) High gas pressure switch (if fitted) set too low b) Reset pressure switch

c) Pilot too high c) Re-adjust pilot

d) Flame not detected d) Adjust flame detector to see main flame

8. Main flame goes out on reaching high fire See “Main flame goes out after lighting” See “Main flame goes out after lighting”

9. Flame goes out. No lockout. a) High or low gas pressure switch (if fitted) faulty a) Rectify switch

b) Duct pressure switch faulty b) Rectify switch.

c) Loss of duct air pressure c) Check main duct fan

d) Interlock operated d) Re-make interlock

10. Flame goes out. Burner goes to lockout. a) Loss of gas a) Turn off gas and investigate

b) Loss of combustion air b) Check combustion air fan

c) Failure of flame detector c) Change detector

11. Burner goes to lockout when it is turned off a) Main gas valves not shutting completely a) Check main valves at once. Turn gas off at

ball valves.

12. Heat output not maintained a) Gas pressure failing a) Investigate

b) Burner faces need cleaning b) Clean burner (see under ‘Maintenance’)

Page 2/2

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