Hamworthy Purewell VariHeat he Installation, Commisioning And Maintenance Instructions page 34

actual setpoint of the CH flow temperature. Subsequent pressing of the Up / Down key will increase / decrease
this
setpoint in 0.5°C increments. After changing the desired setpoint, the On/Off key must be pressed to save the
new setting. If the setting is not saved, the previous setting will become active after the next power down.
8.7.1.1 Boiler and Circulation Pump Operation / Fault Status Screen
This screen will be the default start-up screen, and the control will revert to this screen after 1 minute has elapsed
following the last button to be pressed. Fig 8.7 below shows the various combinations of boiler & circulation pump
Status
Boiler OFF
Boiler Standby
Pre-Purge
HSi On
Gas Valve On
Boiler Normal Run
Boiler Post Purge
Temperature Overshoot
Low Gas Supply Pres-
sure
Flue Blocked
Flame Simulation
Fan Fault
Ignition Lockout
Overheat
Flow Temperature Sen-
sor Fault
Anti-cycling
Function
Service Mode
Remote Control Fault
Servicing Notification
Figure 8.7—Display Status Screens
HAMWORTHY HEATING LTD
Description
Boiler is 'Off' based on display On/Off button
Boiler is 'On' and no heat demand is active
Heat demand active
Hot Surface Igniter warm up period
Safety Time period
Flame stabilisation and normal modulation control
End of a firing or ignition sequence
Blocking due to high flow temperatures
Blocking due to low gas supply pressure
Blocking due to blocked flue
Lockout due to simulation of the ionisation signal
Lockout due fan speed not being achieved
Lockout due to no ionisation signal after ignition attempt
Lockout due to activated Safety Limit Thermostat
Lockout due to short circuit or interrupted sensor input (S1, S2 or
S3)
Blocking due to boiler cycle time
Heat demand activated by Service Mode
Remote Control On/Off input operating too often. Message flashes.
Scheduled service is due. Message flashes
PUREWELL VariHeat he
29
LCD Display
BLR: OFF
PUMP: OFF
BLR: STANDBY
PUMP: OFF
BLR: PRE-PURGE
PUMP: RUN
BLR: IGNITER ON
PUMP: RUN
BLR: GAS VALVE ON
PUMP: RUN
BLR: RUN 065%RATE
PUMP: RUN
BLR: POST PURGE
PUMP: RUN
BLR: TEMP O/SHOOT
PUMP: O/RUN 05MIN
BLR: LOW GAS PRES
PUMP: OFF
BLR: DRAIN BLOCKD
PUMP: OFF
BLR: FLAME SIMLTN
PUMP: RUN
BLR: FAN FAULT
PUMP: RUN
BLR: IGN LOCKOUT
PUMP: RUN
BLR: OVERHEAT
PUMP: RUN
BLR: SENSOR FAULT
PUMP: RUN
BLR: ANTI_CYCLING
PUMP: RUN
BLR: SERVICE MODE
PUMP: RUN
BLR: REM CTRL FLT
PUMP: RUN
BLR: SERVICE DUE
PUMP: RUN
500001155/F