Fault Finding - gledhill GB10 Installation And Servicing Instructions

8.1. CONTROLLER DISPLAY
The controller display unit is equipped with a two digit, 7
segment display and three push buttons as shown schematically
shown in figure 8.1. The display shows the system status and
can be used to display diagnostic information.
The push buttons can be used to enter the parameter menu and
to change the parameters. The push button S1 is also used to
clear locking errors and reset the controller.
8.1.1. Normal Level-1 (Default) Operation
The information display in normal user (Level-1) mode is
described below in table 8.1. If no input is detected when the
display is in level 2 or level 3 mode for a period of about 20
seconds, it will automatically revert back to default mode.
Display
segment
On/Off : Indicates that the controller is active and in standby mode
D1
On : Indicates ionisation i.e. burner is on
On/Off : Lockout error – Requires reset
D2
On : Blocking error detected
b Controller is initialising
h Overheat safety trip
a, d, b & f 'F' – Frost program active
i Heat demand on
j Pump on
8.1.2. Level-2 Display Operations
The level-2 is used to display the temperatures, set points and errors. The information flow diagram for level-
2 is shown below in diagram 8.2. Push buttons S2 and S3 are used to select the parameters vertically and
horizontally respectively.
The level-2 is accessed by pressing and holding push button S1 for minimum of 10s. The controller display
will go back to level 1 if either there has been no input (i.e. buttons pressed) for 30s or if push button S1 is
pressed and held for 10s.
(a) Temperature display
The temperature of the sensor selected is displayed by
alternatively flashing the sensor number and the temperature
measured by it or 'Er' if it is in error. The sensor definition is
shown in table 8.2.
(b) Set point display
The selected set point is displayed by alternatively flashing
the set point number (b1...b6) and the corresponding set point. The definition of set points is listed in table
8.3.
(c) Lockout fault code display
In this mode the lockout fault codes are displayed. The button S2 is used to select this mode and the button
S3 is used to cycle between the stored faults. Fault code reading is displayed by alternatively flashing the
fault number and the internal error number.
VER: 02.3 _260505
Supplied By www.heating spares.co Tel. 0161 620 6677

8. FAULT FINDING

Table 8.1: Level-1 Display description
Description
a a a
h h h
d d d k k k
e e e
b b b
i i i
f f f g g g
m m m
j j j
c c c
D1 D1 D1
S2 S2 S2 S1 S1 S1
- - -
Set/Reset Set/Reset Set/Reset
Diagram 8.1 Controller display Diagram 8.1 Controller display
Table 8.2: Sensor description
Sensor
Description
number
S1 Boiler flow
S2 Boiler return
S3 Flue gas
l l l
n n n
D2 D2 D2
S3 S3 S3
+ + +
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