Explanation Of Service Functions - Worcester ZWBR 7-30 R 30 HE PLUS COMBI Service Booklet

Boiler service functions
3.2

Explanation of service functions

0.0 Last fault
The last fault can also be recalled for servicing pur-
poses when the appliance is functioning correctly.
To delete the stored fault:
B Delete fault (no fault displayed).
B Press the
button.
B Use the
button to select yes.
B Press the
button.
If a list of the last 10 indicated faults is required for serv-
icing purposes, look under Settings -> Service ->
Further options -> Fault history.
0.1 Flow NTC
The temperature measured by the NTC sensor on the
CH flow pipe is indicated.
0.2 Hot water NTC
The temperature measured by the NTC sensor on the
plate-type heat exchanger outflow is indicated.
0.3 Stor. tank temp.sensor 1 (system boiler only)
Indirectly heated DHW cylinder:
The temperature measured by NTC sensor 1 on the
DHW cylinder is indicated.
0.4 Stor. tank temp.sensor 2
(not applicable)
1.2 Code plug
The 10-digit part number of the code plug is indicated.
The code plug determines the appliance functions. If
the appliance is converted from natural gas to LPG or
vice versa (using conversion kit) the code plug also has
to be changed.
1.4 Voltage at terminal 2
(not applicable)
1.5 Desired flow temp.
The CH flow temperature is displayed.
1.8 Power set by module
(not applicable)
1.9 Module detection
(not applicable)
2.0 Operating mode
There are 3 operating modes to choose from.
• Normal mode: the appliance operates according to
the commands received from the programmer.
• Min mode: the appliance runs constantly at mini-
mum output.
The text display shows MIn mode. The 2-digit dis-
play alternates between the CH flow temperature
10
Supplied By www.heating spares.co Tel. 0161 620 6677
and .
– –
• Max mode: the appliance runs constantly at maxi-
mum output.
The text display shows Max mode. The 2-digit dis-
play alternates between the CH flow temperature
– –
and .
2.2 Pump switch mode
If an outside temperature driven control
i
unit is connected, pump control mode 3 is
automatically activated.
The choice of settings is as follows:
• Control Mode 1
For heating equipment without a control unit.
The pump is controlled by the central heating flow
temperature control.
• Control Mode 2 (factory setting)
For heating systems with room thermostat.
The central heating flow temperature control controls
only the gas, the pump is not affected. The room ther-
mostat controls both the gas and the pump.
The pump and fan have an overrun time of between
15 s and 3 min.
• Control Mode 3
The pump is controlled by the outside temperature
driven control unit. In summer mode, the pump oper-
ates only for hot water mode.
2.3 Stor. tank charge output (system boiler only)
The DHW cylinder charging output can be set to any
level between the minimum and maximum rated heat
output for hot water according to the heat transfer
capacity of the DHW cylinder.
B Enter the DHW cylinder charging output setting on
the commissioning record enclosed with the appli-
ance.
2.4 Anti-cycle mode
This function is only active if service function 2.7
Autom. anti-cycle mode is disabled.
The anti-cycle time is factory set to 3 minutes.
The shortest possible anti-cycle time is 1 minute (rec-
ommended for single-pipe and hot-air heating systems).
If the setting 0 is entered, the anti-cycle time is inactive.
B Enter the anti-cycle time on the commissioning
record enclosed with the appliance.
7 181 465 347 (05.01)