22
FAULT
CAUSE
SOLUTION
RESTART PROCEDURE
Compressor 1 overload
alarm
It stops the compressor
Excess current
Check if the electrical
connections are correct.
Check supply voltage and
power surges
Disconnect the chiller by
turning Off the main power
switch (see point 4.1). Open
the electrical box (accessible
through the right panel of the
chiller) and reset the Q1
circuit breaker. Turn the Main
power switch back On
Circuit 1 Power+ offline
or
Alarm Offline Drive
It stops the compressor
Q1 circuit breaker
tripped
Compressor drive
faulty
Check if the electrical
connections are correct.
Check supply voltage and
power surges
Contact authorized technical
service
Disconnect the chiller by
turning Off the main power
switch (see point 4.1). Open
the electrical box (accessible
through the right panel of the
chiller) and reset the Q1
circuit breaker. Turn the Main
power switch back On
Tank level alarm
It stops the whole unit
Level switch did not
switch to the “full”
position
Water leak in the
internal circuit of the
UC
Water leak in the
external water circuit
Water leak in the
water pump
Check that the level switch
works properly and that the
tank is full enough. After
disconnecting the Main Power
switch open the right panel,
open the water tank to check
the water level.
UC 50 and 65 only: Lift the
level switch manually. If it
works correctly you should
hear its contact “click”. Close
the tank and the panel and try
to start the unit again
Contact authorized technical
service
Find the leak and get it repaired
Contact authorized technical
service
to replace the water
pump. Check that the water
quality is inside the limits (see
point 9.1)
Disconnect the chiller by
turning Off the main power
switch (see point 4.1). Turn it
back On after at least 30
seconds have passed