MTS Series 505G2 SilentFlo Hydraulic Power Unit Model 505G2-30 - Manual (Page 46)

Model 505G2.20 - 505G2.30 SilentFlo™ HPU 46
Recovering from an Interlock
Operation
7. Run the HPU for about 30 minutes or until the hydraulic fluid is up to
operating temperature [typically 43–49°C (110–120°F)] before using your
test system.
8. Stop the HPU with the controller.
Recovering from an Interlock
This section describes how to reset each type of HPU interlock. If a fault occurs
(Low Level, Over temperature, Dirty Filter), the HPU will not start. You must
determine the source of the interlock and correct the cause before using the HPU.
If the Main screen is selected, the presence of a fault condition is evident by one
of the fault or alarm indicators and a blue Status indicator. Other indicators can
be lit depending on the interlock.
Click on the Status button to display the Status screen and identify the fault
conditions.
Hyd fluid low level
A low fluid level interlock is indicated on the Main screen by a red Faulted
indicator, a red Oil Level indicator, and a blue Status indicator. The interlock is
generated when the hydraulic fluid falls below the setting of the low level switch
mounted through the top of the reservoir. Perform the following steps to correct a
low level interlock:
1. Determine the cause for the low fluid level and correct it.
2. Add hydraulic fluid to the reservoir until the sight glass on the side of the
HPU indicates the proper level.
3. Verify that the hydraulic fluid level sensor is detecting the proper fluid level.
4. Press Reset to clear the interlock and change the unit status back to normal.
Hyd fluid
overtemperature
A hydraulic fluid overtemperature interlock is indicated on the Main screen by a
flashing red Faulted indicator, a blue Bypass indicator, a red Oil Temp indicator,
and a blue Status indicator. The interlock is generated when the temperature
exceeds 55°C (131°F). The interlock will automatically shut down the HPU. The
HPU cannot return to normal operation until the fluid has cooled. Perform the
following to correct an overtemperature interlock:
1. Start cooling the hydraulic fluid by circulating hydraulic fluid through the
heat exchanger (Overtemp Bypass mode).
A. If necessary, press the Main button to select the Main screen.
B. Ensure that Module #1 Enabled is green.
C. Press the Bypass button. Pump module #1 will start and run to circulate
the hydraulic fluid through the heat exchanger. The red flashing
Faulted indicator changes to yellow Overtemp Bypass and the Bypass
button changed to Stop.