Bosch GREENSTAR HEATSLAVE EXTERNAL 18/25 Instruction Manual page 49
Open vent & sealed central heating systems with mains fed domestic hot water
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Also See for GREENSTAR HEATSLAVE EXTERNAL 18/25:
- Instruction manual (52 pages) ,
- User instructions & customer care manual (20 pages) ,
- Users instructions and customer care manual (16 pages)
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8 716 113 389d
30/3/10
14:01
PROBLEM
CAUSE
FAULTY BOILER
OPERATION:
Noisy operation
Pump noise from air in pump or
worn pump
Worn motor bearings
Fan out of balance
Boiling
Faulty boiler thermostat
Short circuit boiler thermostat
Thermostat bulb not fully home in
pocket
No primary water circulation
Short Cycling
Burner rating incorrect
Boiler thermostat differential
incorrect
External controls not operating
correctly
OIL SMELLS:
Blocked flue, fumes on startup
Oil soaked boiler, faulty burner
operation, numerous lockouts
Odour in cabinet, oil leaks from
pipework, flexible hoses
connections
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 106 389c (01/2009)
All manuals and user guides at all-guides.com
Page 49
REMEDY
Bleed air from pump or replace pump
Replace motor
Replace fan
Replace if necessary
Take out of circuit to check
Ensure bulb is pushed fully home
Check system / circulating pump
& tank overheat thermostat
Correct burner rating
Replace boiler thermostat
Check and correct external controls
Check seals/gaskets
Rectify burner operation and lockouts
Rectify oil leaks, replace components if
necessary
FAULT FINDING
FAULT FINDING
49
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