Fault Finding And Diagnosis; Operating And Fault Displays; 10.1.1 General Information; 10.1.2 Fault Code Table - Worcester Greenstar 8000 Life GR8300iW 30 R Installation And Maintenance Instructions Manual

Fault finding and diagnosis

10 Fault finding and diagnosis
This fault finding information is for guidance only. Worcester cannot be
held responsible for costs incurred by persons not deemed to be
competent.
This fault finding system assumes that the appliance has been operating
normally until the time of failure (i.e. not a first time installation error).
Basic checks
• Ensure that there is 230V power supply and the polarity is correct to
the appliance.
• Ensure that the appliance settings and functionality is correct.
• Ensure the CH programmer/timer is functioning.
• Ensure the room thermostat is functioning.
• Ensure the primary system has adequate pressure/system content
for the system type.
• Ensure there is gas to the appliance?
– Are other gas appliances working, gas cooker/hob for example?
– Has the credit run out on the gas pre-payment meter?
Fault text on the display, description
200 O Boiler in heating mode
201 O Boiler in hot water mode
202 O Boiler in anti-cycle mode
203 O Boiler in standby, no heat energy demand
204 O Current prim. water temp. higher than set
val.
208 O Chimney sweep demand
224 V Safety temp. limiter has tripped
227 V No flame signal after ignition
228 V Flame signal without flame present
62
NOTICE:
On completion of the Service/Fault-Finding task which has required the
breaking and remaking of electrical connections, check:
▶ Earth continuity,
▶ Short circuit check,
▶ Polarity
▶ Resistance to earth.
10.1

Operating and fault displays

10.1.1 General information

• Fault code: indicates the fault.
• Fault category: indicates the fault and its effects.
Fault category O (operating code)
Operating codes indicate the operating conditions in normal operation.
Fault category B (blocking faults)
Blocking faults result in the heating system being shut down temporarily.
The heating system restarts automatically as soon as the blocking fault is
removed.
Fault category V (locking faults)
Locking faults result in the heating system being shut down, and the
system can only be restarted after a reset.
▶ Press the and keys, until Reset is displayed.
The appliance resumes operation.
If a fault persists:
▶ Rectify the fault according to 10.1.2 Fault code table
Fault category W (maintenance codes)

10.1.2 Fault code table

Remedy
–
–
–
–
–
–
1. Open the closed valve in the heating circuit.
2. Top up water until the preset pressure is reached.
3. Connect the plug correctly to the safety temperature limiter.
4. Replace the safety temperature limiter.
1. Open the gas isolator.
2. Change the gas installation.
3. Replace the control unit/burner control unit.
4. Replace the ignition electrode.
5. Replace the monitoring electrode.
6. Replace the ignition cable.
7. Replace the ionisation cable.
8. Replace the air/gas ratio control valve.
9. Correct the burner setting.
1. Replace the air/gas ratio control valve.
2. Replace the ionisation cable.
3. Replace the control unit/burner control unit.
Greenstar 8000 Life – 6720883866 (2019/04)