Tronair 5731, Operation & Service Instructions

Page: 20 / 119

Model: 5731
Hydraulic Power Unit
08/2016 | Rev. 08 Page | 15
5.0 OPERATION (continued)
5.9 SAMPLE VALVE
A sample valve is provided on the rear of the unit to obtain a fluid sample for analysis or inspection.
In order to obtain a representative fluid sample, it is suggested that ANSI/B93.19M-1972 (R1993) be followed.
Reference
Appendix VIII .
Pressurized Fluid! Before servicing the HPU or equipment, ALWAYS open the bypass valve to relieve any
residual pressure in the hydraulic system.
5.10
EMERGENCY SHUT DOWN PROCEDURE
In the event an emergency shutdown is necessary, press the emergency stop switch located on the electrical panel.
(Reference
Figure 5.3.2

Electrical Control Panel ) Open the bypass valve to remove any system pressure.
5.11 DESCRIPTION OF ALARM SYSTEMS
Reference Figure 5.3.2

Electrical Control Panel.
5.11.1 High Fluid Temperature Indicator
The indicator light for high fluid temperature is an active light which will illuminate when the return fluid temperature is 160

F
(71

C) or above. The HPU will shut down if the light is illuminated. The HPU can be re-started when the fluid has cooled
sufficiently and the light has shut off.
If the high temperature light is illuminated reference section
8.0 Trouble Shooting .
5.11.2
Voltage/Phase Monitor Indicator (Options H

J)
The indicator light for the voltage/phase monitor is an active light which will illuminate if there is a problem with the incoming
electrical power source. The HPU will shut down if the light is illuminated.
If the voltage/phase monitor light is illuminated, reference section
8.0 Trouble Shooting .
5.11.3
High and Low Reservoir Level Indicator (Option L)
The indicator lights for high and low reservoir level are active lights which will illuminate when the reservoir fluid level is either
above the maximum level or below the minimum level. The HPU will shut down if either of the lights are illuminated.
If the light on either of the reservoir level indicator lights, restore the fluid level in the reservoir to a normal operating range.
5.11.4 Clogged Filter Indicator Light
The indicator light for the clogged filter is a passive light which will illuminate if the pressure filter element becomes clogged or
is in need of replacement. The HPU will not shut down if the light is illuminated.
If the clogged filter indicator light is illuminated, the pressure filter element requires changing. Reference section 9.13.11
Electric Filter Clogging Indicator (Option R) for maintenance procedure. Pressing the clogging filter indicator light will reset the
light and the light will turn off.
NOTE: Maintenance and Trouble Shooting are to be performed by a skilled and trained technician.