Service manual

Trouble shooting manual EN E000129004
2
Table of contents
1. Overall information
1.1. Overall view……………………………………..………………. 3
1.2. Hydraulic diagram
1.3. Nomenclature……………………………………….………….. 4
1.4. Cover removal
1.5. Emptying the main circuit
1.6. Emptying the d.h.w. circuit
1.7. Control panel
1.8. Condensate trap route…………………………………….. 5
2. Checks, servicing and replacement of
components
2.1. Fan, gas valve and venturi assembly……….…….. 6
2.2. Burner……………………………………………………..………… 7
2.3. Pump
2.4. Main circuit pressure sensor……………………..…….. 8
2.5. Flow water temperature sensor
2.6. Return water temperature sensor……………….…. 9
2.7. D.h.w. heat exchanger sensor
2.8. Three-way diverter valve……………………………..….. 10
2.9. C.h. pressure relief valve…………………………….…… 12
2.10. Electronic control p.c.b.
2.11. Display
2.12. Glow plug and ionisation rod…………………………... 13
2.13. D.h.w. heat exchanger………………………………….... 13
3. FAULT FINDING
Burner states
Pump test (each boiler start)
Temperature test (each boiler start)
Pump monitoring (during operation)
System water pressure monitoring (operation)
3.1. Stand-by
3.2. Pre-rinse
3.3. Ignition
3.4. In operation
3.5. Post-rinse
3.6. Pump afterrun
3.7. Burner is on
3.8. Burner is off
3.9. Display
3.10. Blocking
3.11. Lock-out
3.12. STATUS INDICATIONS
All known indications listed:
1 ……………………………….….. flashing
1 ………………………………..…. continuous
1. …..(1+dot) ……...…. continuous
2 …………………...………....… flashing
2 ………………………………..…. continuous
2. …..(2+dot) ……..…. continuous
3 ……………………………………. flashing
4 ……………….…...........…… flashing
4 ………………..……………..…. continuous
4. …..(4+dot) …….….. continuous
5 ……………..…….…………….. flashing
6 ……………..….…………..…… flashing
7 ……………....…..........….. flashing
8 …………….….…………..……. flashing
9 …………….….…………….….. flashing
9 ……….………..…………..…… continuous
A …..(large A) ……….… flashing
A …..(large A) ……..…. continuous
A/C. …..(large A/C+dot) continuous
A/d. …..(large A/d+dot) continuous
A/b. …..(large A/b+dot) continuous
b/r …..(small b/r)…………..… continuous
Chimney sweeper function
C …..(large C) …….…… flashing
C …..(large C) …….…… continuous
d …..(small d) …………. continuous
b …..(small b) ……...…. continuous
J …..(large J) …….….. continuous (TWIN)
C …..(large C) ……...... continuous (5x)
C. …..(large C+dot) continuous
d. …..(small d+dot) continuous
b. …..(small b+dot) continuous
c …..(small c) ……..….. continuous
E …..(large E) ……..….. flashing
E …..(large E) …………. continuous (TWIN)
F …..(large F) …….…… flashing
H …..(large H) ……..….. flashing
H …..(large H) ……..….. continuous
h …..(small h) ……..….. continuous
nc …..(small nc) ……..….. continuous
O …..(large O) ……….… flashing
O …..(large O) ……….… continuous
o …..(small o) ……….… continuous
o. .....(small o+dot) ………. continuous
P …..(large P) ……...…. continuous
P …..(large P+pump test) continuous
P …..(large P) …………….... continuous (2x)
P/C. …..(large P/large C+dot) continuous
P/d. …..(large P/small d+dot) continuous
P/b. …..(large P/small b+dot) continuous
U …..(large U) ……….… continuous