SuperFlow SF-1020I - Troubleshooting

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6.0 Maintenance
6.2 Troubleshooting
Before assuming anything is wrong with the owbench, verify that all of the electrical connections are
intact, and perform the operation ow test as detailed in "5.1.7 Performing a Flow Test" on page 19. If a
problem with the owbench measuring system arises, check the following:
Table 6-1. Troubleshooting
Problem Solution
The owbench will
not power on
• Ensure the power cord is plugged in
• Check the main breaker at the power distribution box
• Check the 5-amp breaker in the power box behind the panel on the right
side of the owbench
The airow motors
shut o󰀨 after
running for a few
minutes
• The motor is overheating—open the air bypass valve on the back of the
cabinet
• One or more motors are defective and overheating—go to section "6.4.2
Blower Motor Replacement" on page 37.
• The motor temperature sensor is defective or giving an incorrect
reading—go to section "6.4.3 Temperature Probe" on page 39.
Surging motor
• Bi-stable phenomenon due to port in head
• Line voltage varying
• Motor is failing
• Motor controller malfunction
The range selected
cannot be set
• The range orice stepper motor is defective (see section "6.4.4 Orice
Stepper Motor Assembly" on page 39)
No Test Pressure
Reading
• Check internal pressure transducer tubing. Ensure the hose has no kinks
or has not come o󰀨 of the transducer connection port.
• The internal pressure transducer is defective or needs calibrating
No communication
between owbench
and the Modbus
TCP/IP network
• Disconnected or defective cable
• Modbus TCP/IP connection is not congured properly
• Communication port malfunction on computer or control device
• Internal PLC malfunction—contact SuperFlow Customer Service
No Test Pressure
Reading
• Check internal pressure transducer tubing. Ensure the hose has no kinks
or has not come o󰀨 of the transducer connection port.
• The internal pressure transducer is defective or needs calibrating
Flow readings are all
too high or too low
• Perform the owbench ow tests according to the procedures in section
"6.3 Flowbench Flow Tests" on page 33.
Excessive leakage
• Perform the no-ow test according to the procedure in section "6.3
Flowbench Flow Tests".