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6.2
FaULt DiaGnOsis FLOW CHaRt
The following flowchart can be used to determine and rectify a
fault in the operation of a Grant Solo fan convector.
Please first carry out the simple checks, as detailed in Section
6.1, before using the flow chart below.
START
NO
Fix issue with mains
power supply
NO
Replace mains ON/
switch (SP0068)
NO
Replace transformer
(SP0012)
Replace power and
NO
control PCB (SP0129)
and user interface PCB
(SP0128)
Replace fan (SP28-
24) and capacitor
(2μF - SP0229 / 4μF -
SP0237)
NO
Fix issue with heating
source
Balance radiators on
NO
the system to ensure
flow to the Solo
Re-connect sensor.
NO
Replace temperature
sensor if necessary.
(SP0350)
section 6: Fault Finding
Turn unit off and on
Check electricity supply
using the mains ON/
is turned on at the
fused isolator.
NO
Electrical problem
230V AC at 3 way
terminal block
YES
230V AC after mains
ON/OFF switch
YES
Power at grey and
white wires at PCB
~10V AC
YES
Any lights illuminated
on the control panel
NO
Is the heat source
Check hot water supply
functioning correctly
to Solo is above 29°C
YES
Check that the system
is balanced
YES
Inlet pipe to the radiator
is above 29°C
YES
Air and water
Check fans are running
YES
temperature sensor
connected?
! WaRninG !
Exposure to live electrical connections.
The following fault-finding procedures should only be
conducted by a suitably qualified competent person using
the correct test equipment.
OFF switch
Are there any lights
YES
illuminated on the
control panel?
Boost light flashing
YES
Replace transformer
YES
Contact your installer /
service engineer
and heat is being
emitted
Other problem
20°C indicator light
(2 bars) flashing?
The air temperature sensor
can be disconnected at this
point to stimulate cold room
temperatures and force the
20°C indicator light (2 bars) to
flash and fans to run
Check fans are running
heat is being emitted
Check power on fan
output (blue wire) on
YES
PCB ~50V AC
(SP0012)
RESOLVED
YES
NO
YES
NO
PROBLEM
Page 13
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