Troubleshooting - Pentair KEYSTONE EPI-2 Installation And Maintenance Instructions Manual

Keystone ePi-2 quarter-turn electric actuator
InstallatIon and MaIntenance InstructIons
7. Maintenance anD

trouBlesHootinG

7.1 MaintenanCe
7.1.1 routine maintenance
approximately every 2 years:
under normal operating conditions, the ePi-2
is maintenance-free: no actuator maintenance
is formally required, even though visual
inspection for grease leakage or external visible
damages is recommended every two years.
When conditions are severe (frequent operation
or high temperatures), replace all seals that
allow grease leakage or water inlet.
iMportant
Before starting any maintenance operation, make
sure that the mains and all other service voltage
connected to the terminal board are switched-off.
the following checks will assure optimum
performance:
• Make sure there are no grease leaks from the
actuator housing
• Check the external parts for possible damage
and replace them immediately, if necessary.
in case the window glass is broken, the
complete cover must be replaced (see
chapter 8 for individual item numbers)
• Repaint all areas where paint is missing.
in chemically aggressive or saline
environments, remove rust from surfaces and
protect with a rust preventative
• Check that all nuts and bolts securing the
actuator to the valve are tight. if necessary,
re-tighten with a dynamometric key
• For severe applications or if actuator
operation is infrequent, perform maintenance
checks more often
7.1.2 special maintenance
in case of actuator failure, please refer to
section 'trouble shooting', chapter 7.2, for
possible causes.
spare parts can be required from Pentair:
please refer to the individual item number
shown in chapter 8.
In case of malfunction in the mechanical /
electronic components, in case of grease leaks
through the seals or in case of scheduled
preventive maintenance, the actuator must
be disassembled: any damaged parts can be
requested from Pentair with reference to the
attached exploded view drawings and parts
lists.
it is essential that for every component to be
required from Pentair the serial number of the
actuator together with the item number of the
component are indicated in the request.
iMportant
After maintenance work a few operations must be
performed to make sure that movement is regular
and there is no grease leakage through the seals.
note: special maintenance is also
recommended when, during operations, the
actuator generates an excessive noise.
7.2 troubLe-shooting
all ePi-2 actuators have passed the functional
test performed by Pentair quality assurance
personnel.
if the actuator does not work, before trouble-
shooting make sure that:
• The main supply is the same as stated in the
name plate menu
• The green LED for available power supply is
switched on
• Power supply is available to the actuator and
no protective device has declutched in the
plant
• Check the position of the dip switch SW3; it
must be '1'
7.2.1 the electronics do not switch on when
powered
• Check that the value of the main voltage on
terminals l1 and l2 (and in the same case
l3) is correct
• Remove the cover assembly
• Check the continuity of the wires between
terminals l1, l2, l3 and the connector of the
power card
• If there is no continuity on the L1-L2-L3
cables, replace the terminal board
• If continuity on the L1, L2, L3 cables is ok,
replace the entire drive and control unit
7.2.2 24 V dC output voltage not available at
the terminals
• Switch the main power supply off and
disconnect all wires from terminals 33 and 34
• Switch the main power supply on and check if
the voltage on terminals 33 and 34 is between
22 and 26 V Dc
• If the voltage is correct check the external
wiring and the electrical load. it should not
exceed 4 W
• If the voltage is not correct, replace the entire
drive and control unit
7.2.3 the actuator does not work from remote
controls
check that:
• The wiring to terminals 32, 35 and 36 is
correct
• There is no short circuit between wires
• The electrical load does not exceed 4 W
• If external voltage is used, the value has to be
in the 24-120 V AC/DC range
7.2.4 the motor is very hot and does not start
• Wait until the motor cools down before trying
to operate the actuator again
• Check that the number of operations per hour
and their duration is suitable for the actuator
service (see the name-plate)
• Check that the valve operating torque is
within the range of the unit's designed
operating torque
• Always check the causes of abnormal
operation
7.2.5 the motor runs but the actuator does
not move the valve
• Verify that the drive insert correctly fits in the
actuator base
• Verify that the drive insert has enough
engagement with the valve stem
• Verify that the key correctly fits in bore/
keyways applications
• Check that the valve works in manual
operation. if not, it is necessary to check the
manual control area as follows:
- loosen the handwheel security dowel
- remove the handwheel
- check the integrity of the internal parts
- Proceeding with the assembly, follow the
reverse order of the disassembly
- Make sure there are no foreign bodies. Pay
attention not to damage the o-ring seals
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