Operation manual of SR528Q wireless controller
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8. Trouble shooting
8.1 Trouble protection
a
. When there is a break or short circuit between the connection of temperature sensors,
controller switches off the corresponding functions and no more output signals are given,
LED indicator lamp blinks, at the same time error sign
shows on the screen. If
controller does not work correctly, please check following points.
►Press
“▲ ▼”
button to check error code, warning sign blinks on the LCD screen
Display
LED lamp
LCD shows
Error message
CODE Meaning
Cause of error
Error rectification
blinks
T1 - - -
T1 sensor problem
Sensor wiring
short or open
Check
resistance
value or replace
blinks
T2 - - -
T2 sensor problem
Sensor wiring
short or open
Check
resistance
value or replace
blinks
T4 - - -
T4 sensor problem
Sensor wiring
short or open
Check
resistance
value or replace
DHW circuit pump
temperature control
is activated.
T4 sensor not
connected
Connect T4 sensor,
deactivate
functions( CIRC
）
blinks
E0
Communication
error
No
communication
between
controller and
display
Code match again
blinks
E1
Data synchronize
error
Display and
controller is not
synchronized
Press display reset
button to recover
again
Distance to the
controller may
be too far
Remount the
display in a
suitable place