Vaillant COMBlcompact VCW 242E Troubleshooting Manual Download Page 1 | Manualshive

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Summary of Contents for COMBlcompact VCW 242E

Page 1: ...Vaillant Training Logical Fault Finding Guide for all COMBlcompact and THERMOcompact models v t v Vaillant HEATING CONTROLS HOT WATER...

Page 2: ...R Contents Guidance Notes IICD l V If Room Sealed Fan Flued Models RSF COMBlcompact VCW 242E 282E THERMOcompact VC112E 142E 182E 242E 282E Ii r 14 Balanced Flue Open Flue Models COMBlcompact VCW221 24...

Page 3: ...or electrical safety checks Gas Safety Installations and Use Regulations 1984 Gas Safety Installations and Use Amendment Regulation 1990 6 ln order to use this fault finding guide ensure that the oper...

Page 4: ...t JVaillanl HEATING CONTROLS HOTWATER Room Sealed Fan Flued Models RSF guidance note 6 Q 11 YES 1...

Page 5: ...g f l YES Cr I Vaillant HEATING CONTROLS HOTWATER c Check appliance not in time delay isolate power wait 5 seconds and restore d Check anti surge fuse 0 16 amp...

Page 6: ...pump free to rotate and not stuck T Pic11 I tv If a and b are OK change pump I NO a Check appliance and system full pressurised and vented of air b Check servo valve is in C htg position return spring...

Page 7: ...T d Check combustion chamber seals e Cneck air switcn tubes kinked and Sl top cover plate clear T Pic 15 b Check fan pressure switch oper9tes 240v AC from both sides of switch to neutral terminal 1 i...

Page 8: ...lame is visible prior to lockout checkFto H only a Check gas supply to appliance live and purged b Check differential valve open if no return to Q4 c Check20v DC across gas operator if available but o...

Page 9: ...e jet clear T Pic26 NO a TestNTC Elebtronic board Pull off NTC wire from D H W overheat touch it on chassis if burner goes off change NTC T Pic29 d Check burner pressure settings low and high fire rat...

Page 10: ...check venturi diaphragm of water section o YES Pic 30 c Check microswitCh M3 20v DC is making contact and closed circuit Pic31 d Check hy valve moves microswitch r open no eTec through switch M3 CLOS...

Page 11: ...peration All external controls on 11 Can pilot light be lit and established I NO a Check gas supply to appliance live and purged b Check pilot injector burner and supply tubes Pic33 d Check thermocoup...

Page 12: ...t Mother Board a Check 240v AC across pump terminals if not check C to F Refer to Pic 10 b Check pump free to rotate and not stuck If A B are OK change pump Refer to Pic 11 c Check 240v AC available f...

Page 13: ...WATER NO a Check appliance and system full pressurised and vented of air b Check servo valve is in C htg position return spring holds cam down VCW only Refer to Pic 12 c Check differential valve and t...

Page 14: ...nly T 9 Check 20v DC across gas operator if available but operator fails to open audible click change operator Refer to Pic 21 h Check for continuity through gas section microswitch M5 20vDC T Pic38 i...

Page 15: ...y be stuck open e g debris This symptom is very unlikely but can be checked by pulling off the wire to the operator If burner remains alight then change operator a Check demand for hot water tap open...

Page 16: ...ce Freephone 0217883366 0217797141 0800 318076 Vaillant Limited Unit2 Great Western Business Park Armstrong Way Yate BristolBS175NG SalesPhone 0454321736 SalesFax 0454321622 Service Freephone 08003180...

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