Pump fails to deliver
The discharge is too low
The line current is excessive
The total head is too low
The power consumption is excessive
Noisy operation of pump
CAUSE
REMEDY
•
•
The pump delivers against an
excessively high discharge pressure.
Open the isolating valve further,
until the duty point conditions have
been attained.
•
The pump and / or piping are
incompletely vented.
Vent the pump & system completely.
•
•
•
Suction line or impeller clogged.
Remove deposits in the pump & piping.
• • • • •
Reverse rotation.
Change over two of the phase leads
of the power supply cable.
•
• • •
Excessive wear of the pump internals.
Replace worn components by new one.
•
Operating Voltage too low.
Check the supply terminals inform
the supply authorities.
• •
The motor is running on
two phase only.
Replace the defective fuse,
check the cable connection.
•
The rotor is out of balance.
Clean the rotor, Rebalance the
rotor dynamically.
•
The motor refuses to run because
there is no voltage.
Check the electrical system,
inform the supply authority.
•
The pump is silted up.
Clean out the inlet, Pump
components & check valve.
•
•
Defective motor or cable.
Please consult our works.
• •
•
Defective riser pipe. (pipe & gasket)
Replace defective lengths of riser
pipe by new ones, fit new gasket.
•
Abnormal (excessive) drop in the
liquid level during operation.
Please consult our works.
• • •
The Star-Delta motor remains stuck
at the star stage during start-up.
Check the switchgear/control panel.
•
The isolating valve in the discharge
line is not fully open.
Open the valve fully.
•
•
•
Excessive amount of air or gas
in the liquid pumped.
Check the operating parameters
with reference to duty point. &
correctness of submergence.
•
Defective Ammeter.
Replace with new one.
•
The insulation resistance of the winding
is inadequate (The minimum resistance
in warm condition during operation should
be 1000 ohms / volt of operating volt.)
Please consult our works.
•
• •
Defective radial bearing in the motor.
Please consult our works.
•
Vibration caused by improper installation. Correct the installation.
•
The temp. sensor for monitoring the
temp. of winding in the control circuit
has stopped the motor because the
winding temp is too high.
Wait for some time so that the motor
cools down & the pumpset will start
automatically.
6
7
Ni-Hard Submersible Pump
Ni-Hard Submersible Pump
© 2018 mbh pumps (gujarat) pvt. ltd.
© 2018 mbh pumps (gujarat) pvt. ltd.
TROUBLE SHOOTING CHART
Ni-HARD
SUBMERSIBLE
PUMP
Ni-HARD SUBMERSIBLE PUMP
The pump is warranty against defects in material and
workmanship under normal use and service for the period of 15
months from the date of purchase or 12 months from the date
of commissioning, whichever is less.
The General terms and conditions for above warranty are :
1. This warranty is valid only if the pump is operated strictly as
per the Instructions given in the user guide attached herewith.
2. Our obligation shall be limited to rectifying; repairing or
replacing defective items, ex-works/service station/Authorized
Service Center, provided the purchaser has given immediate
written notice. The equipment for repairs should be returned
to us duly packed, on prepaid freight basis.
Model :
Pump Sr. No.
Customer Name :
Address :
Date of Purchase / Bill No.:
Dealers Name :
Signature :
Date :
14, G.I.D.C. Naroda Indl. Estate, Ahmedabad-382 330, India.
Phone : 079-2282 3066 / 2282 1018
E-mail : [email protected] / [email protected]
Website : www.mbhpumps.com
WARRANTY
WARRANTY
