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Idiomas disponibles
Idiomas disponibles
Troubleshooting
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for
hard reset
Action to recover alarm
Troubleshooting
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for
hard reset
Action to recover alarm
Troubleshooting
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for
hard reset
Action to recover alarm
Troubleshooting
22/02/19
HDMS Troubleshooting Guide - Rev 1.0
2
Reverse rotation
The HDMS will trigger this alrm when it detects that the motor is rotating in reverse.
5 minutes
5
The alarm will self recover.
• Check reason for dip.
3
Line voltage out of range
At every power-up the HDMS automatically detects the supply voltage level and deter-
mines whether it is working on a 110 or 230 VAC supply. The under- or over- voltage alarm
level is then set at a level of -20% and + 20% (from the measured supply voltage level)
respectively.
If the supply voltage level is out of these limits for more than 5 seconds then the line volt-
age out of range alarm will be triggered.
5 minutes
5
The alarm will self-recover (in auto-recovery mode) after 5 minutes from when the supply
voltage is within limits.
• Check supply voltage level across L1, N terminals.
• Check for possible disturbances on the voltage network (such as unfiltered variable fre-
quency drives)
4
Wiring fault
If the HDMS measures a current ≤ 750 mA for 2 mains cycles (40 ms approx.) when control
is applied, the HDMS will trigger this alarm. This alarm may trigger in case there is a fault
in the run capacitor, compressor start winding or run capacitor is not connected to RC
RC
terminals.
2
5 minutes
5
The alarm will self-recover after 5 minutes.
• Check that the leads of the run capacitor are properly connected to the HDMS faston
terminals
• Check that the run capacitor is not faulty. In case it is faulty replace with a new one
• Check the resistance on the start winding
• Check that the connection from the HDMS to the compressor start winding (S) + com-
mon (C)
• If run capacitor is not used (or not accessible), short RC
mum 2.5 mm
thickness.
2
EN
and
1
and RC
with a cable of mini-
1
2
3
Carlo Gavazzi Ltd.
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