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Troubleshooting
Flashing sequence when user intervention is required
In the case where user intervention is required to perform a hard reset, the flashing sequence of the alarm will be followed
by a 6 s OFF period followed by the flashing sequence. This flashing sequence will repeat itself until a hard reset is per-
formed.
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for
hard reset
Action to recover alarm
Troubleshooting
2. The under-voltage alarm is only active in bypass state
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for
hard reset
Action to recover alarm
Troubleshooting
Measured current (Arms)
33.6
35.2
38.4
41.6
≥ 44.8
01/06/20
RSBS Troubleshooting Guide - Rev 1.0
2
Under voltage
2
The under voltage alarm will be triggered when the supply voltage (Ue) is:-
Condition 1: Ue < 190 VAC for ≥ 1 s
Condition 2: 140 VAC < Ue < 160 VAC for ≥ 200 ms
Condition 3: 90 VAC < Ue < 140 VAC for ≥ 100 ms
Condition 4: Ue = 0 VAC for > 50 ms (+20 ms)
5 mins (from the moment when voltage is within operational range)
N/A
The alarm will self-recover after the recovery period. Voltage dips/interruptions during re-
covery between starts and/or alarm recovery shall be ignored.
• Check for any loose connections on L / L1 and N / L2 terminals.
• Check quality and level of supply voltage after compressor starts.
3
Locked rotor
The locked rotor alarm will be triggered when the measured current (in bypass state) ex-
ceeds 32 AAC. The alarm trigger time will vary according to the chart below.
5 minutes
4
The alarm will self-recover after the recovery period. If this alarm is triggered on two con-
secutive starts, user intervention will be required to reset the power supply (L/L1 & L2/N).
• Check compressor windings resistance to check if motor is damaged.
• Check for any blockage in the system.
Time to trip (s)
1
0.5
0.2
0.1
0.05
Carlo Gavazzi Ltd.
EN
3
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