Taco 00e Series Instruction Sheet page 7

of a malfunction.
CONTROL
FAULTS
PANEL
LED on
The circulator is
noisy
LED on
Flashing white
LED
Loud noises of
water circulation
LED on
Circulator is not
LED off
running although
the electrical
power supply is
switched on
LED red
Building does not
LED on
get warm.
A red light in the LED indicates the circulator rotor is blocked or sticking. Turn the selector to the position MAX, disconnect and
connect power supply to start the automatic release process. The circulator makes 100 attempts to restart (process lasts approx-
imately 15 minutes). Every restart is signalled by a short flash of white LED light. If the blocking is not removed through the auto-
matic release process after 100 attempts to restart, the circulator goes into standby and the LED remains solid red. Perform the
manual unblocking steps described below.
1. Disconnect power supply - the warning light switches off.
2. Close both isolating valves and allow cooling. If there are no shut-off devices, drain the system so that the fluid level is
beneath that of the circulator.
3. Loosen 4 motor bolts. Remove motor from casing. Carefully pull the rotor/impeller from the motor.
4. Remove impurities and deposits from the impeller and casing.
5. Reinsert the rotor/impeller into the motor.
6. Set the dial to the MAX position.
7. Connect power supply. Check for impeller rotation.
8. If the circulator still doesn't run it will need to be replaced.
Listed below are potential diagnostic error codes which will appear on the LED display in case
CAUSES
Suction pressure is
insufficient - cavitation
Presence of foreign bodies
in the impeller
Air in the system
The flow is too high
Lack of power supply
One fuse in the installation
is blown
The circulator is defective
Overheating
The rotor is blocked
Insufficient supply voltage
The circulator
performance is too low
REMEDIES
Increase the system suction
pressure within the
permissible range.
Disassemble the motor and
clean the impeller.
Vent the system. Repeat
fill and purge steps.
Reduce the pump speed.
Verify voltage value of the
electric plant.
Verify the connection of the
motor.
Verify the fuses of the plant.
Replace the pump.
Let the pump cool down for
some minutes. Then try to re-
start it. Verify that the water
and ambient temperature are
within the indicated
temperature ranges.
Disassemble the motor and
clean the impeller. See
unblocking procedure below.
Verify that the power supply
matches the data on the name
plate.
Increase the suction head.
Increase speed or ∆P setting.
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