DAYLIFF DPL 550, Installation And Operating Manual

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6. TROUBLE SHOOTING
No water in the prefilter or
clogged prefilter
The pump is not drawing
water
Closed valve in the pipes
Clean prefilter
Allow water into suction side
Air getting into the suction
pipe
Open valves
Prime the suction line
The motor is not running
The electric power supply
is turned off
M o t o r e l e c t r i c a l
connections are faulty
Motor shaft locked by a
faulty ball bearing
Turn on power
Check and rectify connection
Replace ball bearing
10
Air getting into the suction
pipe
Presence of foreign bodies
in the pump body
Cavitation
Noisy pump
Prime the suction pipe
Remove foreign bodies
Prime pump and get rid of air
5.9 IPM module
When IPM fails, the motor stops running immediately which is registered as
malfunction. The motor will then clear the fault automatically 30seconds later and
restart. After three consecutive attempts, the pump will shut down and will need to be
manually cleared/restarted before running.
5.7 Overload protection
If the operating current is more than the set value of 6.2A, the pump will stop running
which is registered as malfunction fault.
Upon starting the pump, the current is monitored for 5secs, if the value exceeds the
set value of 6.2A, the controller will stop the pump which is registered as Locked
rotor. After 10seconds, the pump will restart, the current is monitored again and if
the situation persists for three consecutive times, the motor will shut down completely
which is registered as malfunction of the pump. Rectify the fault and restart the
pump.
5.8 Locked rotor protection