Fault
Sources
Causes
Solutions
Return temperature too low
The return temperature (or room
temperature) is below the fixed limit P242
(or P244)
Temperature sensor operating problem
Check the operation of the sensor
Supply air temperature limits incorrectly
configured
Check the configuration
Room temperature too low
Operating problem with the heating
elements
Check the operation of the valves, heat recovery
unit, mixing box, etc.
Operating problem with the cooling
elements
Check the operation of the valves, heat recovery
unit, mixing box, etc.
Return temperature too high
The return temperature (or room
temperature) is above the fixed limit P243
(or P245)
Temperature sensor operating problem
Check the operation of the sensor
Supply air temperature limits incorrectly
configured
Check the configuration
Room temperature too high
Operating problem with the heating
elements
Check the operation of the valves, heat recovery
unit, mixing box, etc.
Operating problem with the cooling
elements
Check the operation of the valves, heat recovery
unit, mixing box, etc.
Fresh air temperature sensor
Temperature measurement <-50° C
or >90° C
Temperature sensor open circuit or
short-circuit
Check the sensor wiring or replace the sensor
Supply air temperature sensor
Return air temperature sensor
Room air temperature sensor
Additional casing supply air sensor
Loss of communication with Th-Tune The Th-Tune is no longer communicating
with the PLC
The wiring between the PLC and the
Th-Tune is damaged
Check the wiring between the PLC and the
Th-Tune, check for the line termination resistors
Coil 1 pump fault
The pump motor is indicating a fault
Reversal in fault contact direction
Check parameters P362 and P363
Coil 2 pump fault
Overvoltage, motor overload, motor power
supply problem, etc.
Check the condition of the pump motors
7 - FAULTS
FLOWAY
EN-48