Instruction Manual
PES1513 Electric Power Unit - V1.1
www.durapac.com
Page 7 of 8
7.0
Troubleshooting
Problem
Cause
Solution
Motor will not start
Inadequate or faulty electrical
supply
Check the condition of the
power unit’s power cord.
Check the condition of
extension cords
Check for tripped circuit
breaker. Be sure breaker is of
adequate size
Contact a qualified electrician
for any necessary repairs
Noisy operation
Air trapped in system
Check all points where air may
leak into the system
Refer to 6.2 – Bleeding Air from
the System
Power unit reservoir too full
Drain fluid to correct level
Low fluid level in power unit
reservoir
Refer to 6.1 – Adding Hydraulic
Fluid
Fill and bleed the system
Power unit oil is over-
heating
Oil viscosity is too high
Refer to 6.3 – Changing
Hydraulic Fluid
Refill with a good quality
hydraulic oil
Low fluid level in power unit
reservoir
Refer to 6.1 – Adding Hydraulic
Fluid
Fill and bleed the system
Power unit runs but will
not pump oil
Power unit is not primed
Run power unit a few minutes
tipping from side to side
Externally adjustable relief valve
is not correctly set
Reset the relief valve to
appropriate level
Damaged o-ring
Send to a Durapac authorised
service centre for repair
Defective control valve
Send to a Durapac authorised
service centre for repair
Power unit does not
reach rated capacity
Low fluid level in reservoir
Secure load by other means.
Depressurise power unit and
hose, remove application, then
fill and bleed the system
Leaking system components
Repair or replace as necessary
Poor performance
Fluid level in power unit is low
Secure load by other means.
Depressurise power unit and
hose, remove application, then
fill and bleed the system
Application does not
extend, move or respond
to pressurised fluid
Overload condition
Remedy overload condition
Loose couplers
Tighten couplers
Faulty couplers
Replace couplers
Malfunctioning power unit
Contact a Durapac authorised
service centre for repair
