YANGTECH HP Series, Operation Manual

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A05G072
8
7.
COMMON ABNORMAL SITUATIONS AND SOLUTIONS
ITEM SITUATIONS POSSIBLE CAUSES SOLUTIONS
1.
Pump stop or
pump can`t
start
No power or incorrect power
Supply power or correct
power source
Magnetic switch damaged Replace a new one
Fuse/current protector action Reset or change fuse
Motor coil fail / damaged Replace a new one
Power cable loosing Check and reconnect
2.
High temp.
(Motor
temp.>75
℃
)
High viscosity of fluid Reduce the fluid viscosity
High pressure output Check reason and correct it
Capacity of inverter too much or
insufficient
Change a suitable one
Frequency of inverter too high
or too low Set frequency variation range
between 30~60Hz
Output line block or valve closed Clear block or open valve
Incorrect power source Change to a correct one
The motor coil insulation is bad
Replace a new motor
Abrasion of bearing or the bad
lubricity Renew the bearing or improve
the lubricity
High environmental temperature
or bad ventilation Improve temperature and
ventilation of the environment
3.
No fluid
output
Motor is stop Check with ITEM 1.
Blocking of the inlet pipe (or
foot valve)
Eliminate from blocking
Damage of the diaphragm Replace with a new one
Flow regulator was set too low
(stroke <1.0mm)
Adjust to proper setting
Drive mechanism malfunction
Renew the drive mechanism
(Return to factory)
4.
Flow rate
reduce
obviously
Blocking of the inlet pipe (or
foot valve)
Eliminate from blocking
Fluid viscosity become high Reduce fluid viscosity
Leakage of the pipe Patch up the leakage
Drain valve not close Close drain valve
Gas accumulates in pump head Purge gas through drain valve
5.
Abnormal
noise or
vibration
Power source problem (incorrect
or disconnection of power or
lack of a phase)
Check and reinstall power
source
Abrasion of bearing or the bad
lubricity
Renew the bearing (Return to
factory)or improve the
lubricity
Abrasion of gears of the reducer
Replace with a new reducer
(Return to factory)
Eccentric mechanism bearing
failure Replace with a new one
(Return to factory)
6. Looseness of fix-screws Fix the loosen screws