Taco 0015e3

-8-
Unlocking Procedure: A red LED indicates the circulator is locked or sticking. Disconnect and connect power supply to start the automatic
release process. The circulator makes 100 attempts to restart (process lasts approximately 15 minutes). Every restart is signaled by a short white
ash of LED light. If the locking is not removed through the automatic release process after 100 attempts to restart the circulator, it goes into
standby and the LED remains red. In this case follow the manual procedure described in the next steps: during any attempt, the red LED light
keeps blinking; after that the circulator tries again to start. If the locking is not removed through the automatic release process (the warning
light returns to be red), perform the manual steps described below.
1. Disconnect power supply - the warning light switches o
2. Close both isolating valves and allow cooling. If there are no shut-o devices,
drain the system so that the uid 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. Connect power supply. Check for impeller rotation
7. If the circulator still doesn’t run it will need to be replaced
FAULTS CONTROL PANEL CAUSES REMEDIES
The circulator
is noisy
LED on
Suction pressure is
insucient — cavitation
Increase the system suction
pressure within the
permissible range.
LED on
Presence of foreign bodies
in the impeller
Disassemble the motor
and clean the impeller.
Loud noises of
water circulation
Flashing
white LED
Air in the system.
Pump may be air-bound
Vent the system. Repeat
ll and purge steps.
Circulator is not running
although the electrical
power supply is
switched on
LED o
Lack of power supply
Verify voltage value of the
electric plant. Verify the
connection of the motor.
Circuit breaker might
be tripped
Check circuit breaker at panel
and reset if necessary.
The circulator is defective Replace the pump.
Overheating
Let the pump cool down for
some minutes. Then try to restart
it. Verify that the water and ambient tem
-
perature are
within the indicated
temperature ranges.
LED red
The rotor is blocked
Disassemble the motor and
clean the impeller. See
unlocking procedure below.
Insucient supply voltage
Verify that the power supply
matches the data on the
name plate.
Building does
not get warm.
LED on
System may be air-bound
Vent system.
Repeat ll and purge steps.
8. Troubleshooting the error codes: Listed below are potential diagnostic error codes which will appear on the LED display in case of a malfunction.
9.