Ulvac C30VR Series, Installation, Operation, Maintenance And Troubleshooting Instructions

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Section 8 Troubleshooting
ULVAC CRYOGENICS INCORPORATED 8-1
Section 8 Troubleshooting
8.1 Problem types ....................................................................................... 8-1
8.2 Troubleshooting procedures ................................................................. 8-2
8.3 Alarm code descriptions ....................................................................... 8-4
8.1 Problem types
C30VR compressor indicates the state of warning or breakdown with a buzzer sound and
STS indicators.
NOTE: When a problem occurs, check the status of STS indicators. Also, make sure that
the power-supply voltage, cooling water flow rate and its temperature, helium gas
pressure, input power cable connections, and the remote cable connections are
all in an appropriate state.
There are eight indicators called “STS” at the front panel of the compressor. Please
refer to Figure 8-1 for the alarm types of warnings and faults
（ The alarm status code
table shown in Figure 8-2 is labeled on the compressor body
）
.
NOTE: Ensure that all the operation command of the compressor is OFF while trouble
shooting the compressor.
●→ lit up ○→ off
Figure 8-1 Alarm status table
STS
Description
STS
Description
4 TS3 Over Temperature 8 Controller Fault
3 TS1 Over Temperature
ALARM STATUS TABLE
1
Reverse Phase,
Low Volt
5
LPS Low Helium
Pressure
2 6 TS2 Over Temperature CP2 Cold Head Trip
7 OL1 Comp. Over Current
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Open Phase,