SR882 operation manual
~ 52 ~
Error message on LCD
screen
Meaning
Cause of error Error rectification
T1 - - -
T1 sensor problem
Sensor wiring
open or short
Check resistance
value, replace
T2 - - -
T2 sensor problem
Sensor wiring
open or short
Check resistance
value, replace
T4 - - -
T4 sensor problem
Sensor wiring
open or short
Check resistance
value, replace
SFB function is
activated
T4sensor not
connected on
controller
connectT4or close
SFB function
Thermostat function
is activated
T4sensor not
connected on
controller
Connect T4 or
close AHO
function
T5 - - -
T5 sensor problem
Sensor wiring
open or short
Check resistance
value, replace
Thermal energy
measuring function
is activated
T5sensor not
connected on
controller
Connect T5 or
close QHQM
function
7.2 Trouble checking
The controller is quality product, conceived for years of continuous trouble-free operation. If
a problem occurs, the cause of the problem very often lies not in the controller but in the
peripheral components. The following description of some well-known problems should help
the installer and operator to isolate the problem, so that the system can be place back 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.
