IDEAL IMAX XTRA E320 Installation And Servicing page 27

30 BASIC CONTROLS DISPLAY (MASTER PANEL SHOWN)
Both Master and Slave Modules employ a control panel.
Slave control panel can be fully accessed by first removing cover (see Frame 52).
A. Burner switch
B. Pressure gauge
C. Display
D. Reset button
E. Mode button
F. Step button
G. Store button
H. + button (to increase
values)
I. - button (to decrease
values)
Sequence Boiler Status
A DHW valve energised
0 Standby, no heat request
1 Pre-purge, post purge
2 Ignition
3 Burner on in CH mode
4 Burner on in DHW mode
5 Waiting for air pressure switch to open or close
6 Burner off because a set value has been
reached
7 Pump overrun in CH mode
8 Pump overrun in DHW mode
During the operation of the
appliance can be determined by the display.
1. Normal Operation Mode
The unit will either be in standby or in operation. The first
digit on the display shows the boiler status (see table). The
last 3 digits show the flow temperature.
2. Blocking Mode
The Module will enter blocking mode under certain fault
conditions. Whilst in blocking mode the burner is switched
off. Once the fault conditions are clear the boiler will
automatically reset itself. In blocking mode the display will
alternate between showing a '9' in digit one, along with the
flow temperature in digits 2, 3 and 4.
9 9 6
e.g.
IMAX XTRA -
Installation & Servicing
INSTALLATION
MASTER MODULE
CONTROL PANEL
MODE STEP
E F G
xtra
, the status of the
C D
RESET
xtra
STORE +
H
Followed by the blocking code 'bxx'. Refer to page 54 for
Blocking Code references.
3. Error Mode
In error mode the display will show the error code.
Refer to Page 52 for error codes.
The Module will enter error mode under certain fault
conditions. The unit will be inoperative until the fault is
rectified. The reset button is used to reset the Module
control box after an error has occurred.
Self Check and Anti-seize Modes
After switching on the mains power or after a reset, the
boiler performs a selfcheck, i.e. the DHW valve is energised
and the CH pump is switched on for 10 seconds. This
cycle repeats itself every 24hrs, as long as no heat request
is given in 24hrs.
Burner on/off switch
With the burner switch set to 'off' the boiler will not respond
to a CH demand. However, it will respond to a DHW
demand and the pump anti-seize and frost protection
modes are still operational any one of which could cause
the boiler to fire. Note. The burner switch is NOT a mains
isolation switch.
CH/DHW Systems
In standby mode pressing and holding the '+' button for 3
seconds turns the CH system on/off.
In standby mode pressing and holding the '-' button for 3
seconds turns the DHW system on/off.
A B
0
I
I
b 1 8
E 3 6
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