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10. CLEANING
Before any maintenance/cleaning operation assure to comply with the precautions written in the dedicated paragraph of the
"Installation, operation and maintenance general manual" supplied with the fan.
The unit (IP55) can be washed with water jets. In this case it is recommended to drill a hole under the plastic hub cover for water
drainage.
11. TROUBLESHOOTING (Modbus)
11.1 Connection parameters
11.2 Modbus Registers - Input Register
These registers are READ-ONLY, and can be read using the function 04 READ INPUT REGISTERS.
Register
Description
Address
3
Measured speed
10
Alarm 1
17
Alarm 2
11.3 Alarm codes/LED status/Troubleshooting
ALARM 1
ALARM 2
VALUE
VALUE
0
0
1
0
2
0
Motor synchronization lost – wrong motor parameters
3
0
Over voltage: supply voltage above 565Vac (DC bus
4
32
Under voltage: supply voltage below 212Vac (DC bus
4
33
4
113
4
114
For additional information on HVLS Modbus control, contact the manufacturer/technical support.
Protocol
Baud Rate (bps)
Data bits
Parity bits
Stop bits
HVLS Slave Address
Dimension
Data
(Word)
Type
1
ushort
1
ushort
1
ushort
ALARM DESCRIPTION
POSSIBLE CAUSE
No error
Memory error – motor parameters lost
Short circuit – electronics power
module damaged
or electronics damaged
voltage over 800V) during motor running
voltage below 300V) during motor running
Electronics temperature over 85°C
(check input register 15)
Motor windings temperature over 125°C
(check input register 16)
MODBUS/RTU over RS485
9600
8
none
2
1
U.M. (data on
the register)
0.1rpm
-
-
Contact manufacturer/technical support
Board damaged – replace board
If motor windings OK (all 3 windings have same resistance), replace
If motor windings damaged (open/short circuit), replace motor.
Check power supply voltage
check power supply wiring
Check power supply voltage
check power supply wiring
Check if operating temperature is above rated maximum operating
Check mechanical load for anomalies (e.g. difficult turning)
Check if operating temperature is above rated maximum operating
Check mechanical load for anomalies (e.g. difficult turning)
20
Example
Register value → Real value
490 → 49rpm
See table (§ 11.3)
See table (§ 11.3)
TROUBLESHOOTING
-
Check motor windings.
board.
temperature.
temperature.
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