Worcester Greenstar i System ErP Series Installation, Commissioning And Servicing Instructions page 68

Fault finding and diagnosis
Fault
Display text code
Internal error b7
Internal error F0
EH
Internal error F1
Internal error F0
Internal error F1
Internal error F0
Internal error F0
Internal error F0
Internal error
A8
CC
Table 49
68
Cause
code Description
257 Control box or the HCM is defective.
258 Control box or the HCM is defective.
258
259 Control box or the HCM is defective.
262 Control box or the HCM is defective.
263 Control box or the HCM is defective.
272 Control box or the HCM is defective.
280 Control box is defective.
290 Control box is defective, (Analogue /
Digital converter reference error).
328 Internal error (Mains voltage / frequency
may be inconsistent)
235 Incompatible HCM software version
356 Low mains voltage, (the voltage may be
interrupted or inconsistent).
360 HCM invalid
361 HCM invalid
363 Ionisation measuring fault
356 Low mains voltage, (the voltage may be
interrupted or inconsistent).
800 Outdoor sensor defect (available when
accessary outdoor sensor is connected)
Possible solution/check
▶ Check:
– HCM is inserted properly.
– Connections of the control box.
▶ Contact technical helpline.
▶ Check:
– HCM is inserted properly.
– Connections of the control box.
▶ Contact technical helpline.
▶ Check:
– HCM is inserted properly.
– Connections of the control box.
▶ Contact technical helpline.
▶ Check:
– HCM is inserted properly.
– Connections of the control box.
▶ Contact technical helpline.
▶ Check:
– HCM is inserted properly.
– Connections of the control box.
▶ Contact technical helpline.
▶ Check:
– HCM is inserted properly.
– Replace HCM if necessary.
– Connections of the control box.
▶ Replace control box if necessary.
▶ Check:
– HCM is inserted properly.
– Connections of the control box.
▶ Replace control box if necessary.
▶ Check:
– HCM is inserted properly.
– Connections of the burner control.
▶ Replace burner control if necessary.
▶ Check the voltage and frequency.
Revised HCM software requires latest version of control
box to operate correctly
▶ Replace the control box with the latest software.
On the barcode label of the burner control the software
version is indicated.
▶ Check mains voltage.
The inserted HCM does not correspond with the control
box. HCM must be within the same appliance type.
▶ Check the correct HCM is fitted.
– HCM identification number found in Technical data
table.
The inserted HCM does not correspond with the control
box or HMI type.
▶ Contact technical helpline.
▶ Check earth harness's and connections
▶ Check mains voltage.
▶ Check:
– Sensor harness and connector.
– Operation, replace if necessary.
Greenstar i System
ErP
- 6 720 806 945 (2015/07)