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Servicing 9
Instructions for Installation and Servicing turboMAX plus and thermoCOMPACT R1
37
10.3 Indicator lights (thermoCOMPACT only)
The boiler control panel also contains three indicator
lights whose function is as follows:
• Red lock out indicator (1), when illuminated boiler is at
lock out.
• Yellow flame indicator (2), when illuminated main
burner is ignited.
• Green indicator (3) is illuminated but has no function.
10.4 Logical fault finding procedure
These checks must be carried out before attempting to
use the fault finding guide.
1. Carry out electrical safety checks (See Section
‘Preliminary Electrical Checks’).
2.Check that the external electricity supply to the boiler
is on, and a supply of 230 V~ is present between
boiler terminals ‘L’ and ‘N’.
3. Check that the gas supply to the boiler is on, that it
has been correctly purged and that an inlet pressure
of 20 mbar is available at the gas valve. (See Section
‘Gas Supply’).
4.Ensure the heating system is full of water and charged
to between 1 and 1.5 bar. If not, refill and vent the
system. (See Section ‘Filling the heating system’).
Ensure boiler flow and return service valves are open.
5.Check that the main ON/OFF control is set to the ‘ON’
position.
6.Set the central heating temperature to maximum.
7. Set the domestic hot water temperature to maximum
(turboMAX only).
8.Check that all external controls are on and calling for
heat (if, no external controls are fitted, boiler
terminals 3 and 4 must be linked). Check that the
boiler anti-cycling economiser is not engaged.
Procedure
Note!
Always check the operation of the boiler for
central heating first before checking hot water
operation. Do not open a hot water tap unless
instructed to do so by the fault finding guide
(turboMAX only).
1. If a fault code is showing in the boiler display follow
the fault finding charts referring also to the fault code
and diagnostic mode tables.
2.If the boiler is not functioning correctly and a fault
code is not showing in the boiler display follow the
fault finding charts referring also to the status mode
table.
Note!
If the boiler display is completely blank initially
check the two fuses (Isolate the electrical
supply before checking the fuses, spare fuses
are located on the inside of the control box rear
cover).
10 Fault Finding
10.1 Introduction
The turboMAX plus and thermoCOMPACT boilers have
an inbuilt advanced multifunction diagnostic display to
assist with fault finding in the unlikely event of a boiler
malfunction.
The display features the following four modes:
Normal Mode
Under normal conditions the boiler display will show the
boiler flow temperature, this indicates that the boiler is
operating correctly after an internal self check.
Status Mode
The status display is helpful in diagnosing faults where a
fault code is not displayed.
Diagnostic Mode
In order to assist with the pinpointing of a particular
fault it is possible to use the boiler display in a
diagnostic mode to interrogate the boiler about the
status of certain components.
Fault Mode
Should a fault develop in the boiler the display will show
a fault code indicating what the problem may be.
10.2 Indicator lights (turboMAX plus only)
The boiler control panel also contains three indicator
lights whose function is as follows:
• Red lock out indicator (1), when illuminated boiler is at
lock out.
• Yellow flame indicator (2), when illuminated main
burner is ignited.
• Green warmstart indicator (3):
Illuminated = Warmstart switched ON
Not illuminated = Warmstart is switched OFF and there
is no demand for hot water
Flashing = There is either a demand for hot water or
warmstart
Fig. 10.1 LED indicators
1
2
3
