aerauliqa QHS Series, Specific Manual

16

ALARM 1 

VALUE

ALARM 2 

VALUE

LED BLINKS

(single blink

approx. duration)

ALARM DESCRIPTION

POSSIBLE CAUSE

TROUBLESHOOTING

0

0

1 Blink/2sec

(1s)

No error

-

1

0

1 Blink/s

(0.5s)

Memory error – motor parameters lost

Contact manufacturer/technical support

2

0

2 Blink/s

(0.25s)

Short circuit – electronics power

module damaged

Board damaged – Contact manufacturer/technical support

3

0

3 Blink/s

(0.17s)

Motor synchronization lost – wrong motor 

parameters or electronics damaged

Check motor windings.

If motor windings OK (all 3 windings have same 

resistance), contact manufacturer/technical support.

If motor windings damaged (open/short circuit), replace 

motor

4

1

5 Blink/s

(0.1s)

Supply voltage out of range 135Vac÷550Vac 

(DC bus voltage 190÷780V) only with motor 

still - not running

Check power supply voltage / check

power supply wiring

4

32

5 Blink/s

Supply voltage above 565Vac (DC bus 

voltage over 800V) during motor running 

(instantaneous value)

Check power supply voltage / check

power supply wiring

4

33

5 Blink/s

Supply voltage below 107Vac (DC bus 

voltage below 150V) during motor running 

(instantaneous value)

Check power supply voltage / check

power supply wiring

4

34

5 Blink/s

“Restart on the fly” failed

The drive couldn’t catch the impeller – power cycle/retry

4

49

4 Blink/s

(0.13s)

U phase voltage missing/disconnected

(or wrong motor parameters)

Check power supply/wiring. If wiring OK, contact 

manufacturer/technical support

4

50

4 Blink/s

V phase voltage missing/disconnected

(or wrong motor parameters)

Check power supply/wiring. If wiring OK, contact 

manufacturer/technical support

4

51

4 Blink/s

W phase voltage missing/disconnected

(or wrong motor parameters)

Check power supply/wiring. If wiring OK, contact 

manufacturer/technical support

4

113

6 Blink/s

(0.08s)

Electronics temperature over 85°C

Check if operating temperature is above rated maximum 

operating temperature.

Check mechanical load for anomalies (e.g. difficult turning)

4

114

7 Blink/s

(0.07s)

Motor windings temperature over 125°C

Check if operating temperature is above rated maximum 

operating temperature.

Check mechanical load for anomalies (e.g. difficult turning)

4

115

no Blink

Short circuit on Pt100 motor temperature 

probe

Check temperature probe wiring – detects temperature 

probe manumission

10.3 Alarm codes/LED status/Troubleshooting

For additional information on HVLS ModBus control, contact the manufacturer/technical support.