Vertiv™ | Liebert® SRC-G | User Manual 68
System Operation and Maintenance
6.2.4. Power SPD
There are four status indicators on the power SPD, as shown in Figure 6-4. The status indicator is green during
normal operation, and turns red when the SPD fails.
No. Description
1 Status Indicator (4 PCS)
Figure 6-4 Location of Status Indicators of Power SPD
The power SPD does not need special maintenance. It needs regular check for non-loosening and normal status
indicating. If any one of the following phenomena appears, the power SPD has failed and it needs to be replaced
immediately.
6.2.5. Thermal Expansion Valve (TXV)
The Thermal Expansion Valve keeps the evaporator supplied with enough refrigerant to satisfy load conditions.
Its proper operation can be determined by measuring the superheat level. The correct superheat setting is
5.6 °C to 8.3 °C (10 °F to 15 °F).
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