IOM / TELECOOL THN - 0104 - E Page 23
TROUBLESHOOTING
TROUBLESHOOTING
On the next pages you will find a list of the most common
causes that may cause the package unit to fail or malfunction.
These causes are broken down according to easily identifiable
symptoms.
You should be extremely careful when
attempting to implement any of the possible
remedies suggested: overconfidence can
result in injuries, even serious ones, to inexpert
individuals. Therefore, once the cause has
been identified, you are advised to contact the
manufacturer or a qualified technician for help
.
FAULT
The unit does not start
The compressor is noisy
Presence of abnormally high
pressure
Possible causes
No power supply
The electronic card is cut off from the
power supply
Alarms have been triggered
The phase sequence is wrong
The compressor is rotating in the wrong
direction
Insufficient flow of air to the condenser
Presence of air in the refrigerant circuit,
as revealed by the presence of bubbles
in the flow indicator also with
undercooling values exceeding 5 °C
Corrective actions
Check that power is being supplied both
to the primary and auxiliary circuits.
Check the fuses
Check whether any alarms are signalled
on the microprocessor control panel,
eliminate the causes and restart the unit.
Invert two phases in the primary power
line after disconnecting them upstream
from the unit
Check the phase sequence relay. Invert
the phases on the terminal board after
disconnecting the unit and contact the
manufacturer.
Check for the presence of obstructions
in the condenser section ventilation
circuit
Check whether the condenser coil
surface is obstructed
Check the condensation control device
[optional]
Drain and pressurise the circuit and
check for leaks. Evacuate slowly [for
more than 3 hours] until reaching a
pressure of 0.1 Pa and then recharge in
the liquid phase
