Bulex Thema Condens AS 48-A, Руководство пользователя, Страница: 175 / 199

MAKSİCONDENSE 48-65
Notes
03/2020 169 T
EKNİK EĞİTİM VE DESTEK
Display Text display (description) Possible cause
F.71
Fault: Flow sensor
(flow sensor reports a constant value)
Flow sensor not correctly positioned on the
flow pipe.
Flow sensor defective.
F.72 Fault: Flow/return sensor
Flow and/or return sensor defective (toler-
ances too great)
F.73
Fault: Water press. sensor
(water pressure sensor signal in the
wrong range (too low))
Line break in water pressure sensor line or
Short circuit to 0 V or
Water pressure sensor defective
F.74
Fault: Water press. sensor
(water pressure sensor signal outside
correct range (too high))
Line to water pressure sensor has short circuit
to 5 V/24 V or
Internal fault in water pressure sensor
F.75
Fault: Pump/water deficiency
(no pressure change detection when
starting pump)
Water pressure sensor and/or pump defective
Air in the heating system
Insufficient water in unit;
check external bypass;
External expansion vessel connected on flow
line
D.149 = 1 Pump blocked alarm
Clean the pump; replace the pump
D.149 = 2 Electrical pump fault
Check supply voltage; replace the pump
D.149 = 3 Pump dry fire
Check system pressure; make sure there is no
remaining air in the system.
Replace the pump
D.149 = 5 No pump jump detected
Check pressure sensor; replace pressure sen-
sor
D.149 = 6 No PWM response from
pump
Check the pump cable harness; check the
PCB; check the plug connections;
check the supply voltage; replace the pump;
replace the PCB
D.149 = 7 Incorrect pump detected
The detected pump does not match the unit
–
pump does not have a reliable identification
code; use the pump from the matching spare
parts programme
D.149 = 8 Volume flow test after
purging programme
not successful
Check that all locks are open or open thermo-
static valves; check system pressure (
≥ 1.5
bar)
F.77
Fault: Flue non-return flap/conden-
sate pump (water level in condensate
pump/no return signal (bridge) from
"2 in 7" accessory module)
Condensate pump defective
Cable connection defective