Operation manual of SR528Q wireless controller
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8.2 Trouble checking
The controller is a qualified product, which is conceived for years of continuous trouble-free
operation. If a problem occurs, the most of causes is from the peripheral components but no
relation with controller itself. The following description of some well-known problems should
help the installer and operator to isolate the problem, so that the system can be put into
operation as quickly as possible and to avoid unnecessary costs. Of course, not all possible
problems can be listed here. However, most of the normal problems encountered with the
controller can be found in the list below, only return the controller to seller when you are
absolutely sure that none of the problems listed below is responsible for the fault.
Warning
！
Remove the device from the mains supply before opening the case
A potentially defective sensor can be checked using an ohmmeter. To do this, the
Symptoms
Secondary symptoms
Possible cause
Procedure
Controller does
not appear any
functions at all
Display shows nothing,
no display illumination
Controller power
supply is interrupted or
program is out of work
Check the
controller power
cable and fuse
The solar pump
doesn’t operate,
despite the fact
that switch-on
conditions are
satisfied
The pump symbol on the
display blinks
Pump power supply is
interrupted
Check the pump
power cable
Solar circuit
pump doesn’t
operate
The pump symbol in the
display doesn’t blink.
Lighting
blinks
The maximum storage
tank temperature
(SMX) has been
reached
The maximum
collector temperature
(EM) has been
reached.
No fault
T1 - - -
Error message displays
on the screen
Sensor fault (short
circuit or open circuit)
Check values of
every connected
sensor; replace all
defective sensors
and /or cabling.
The solar pumps
operated, despite
the fact that the
switch-on
conditions are not
satisfied
The pump symbol on the
display blinks.
Holiday function or
Frost protection
function or tank
re-cooling function is
activated.
No problem, it is
normal. If
necessary to
deactivate the
corresponding
functions.