57
ERROR
CODE
TYPE OF ERROR
CONSEQUENCE
of ERROR only on
Chiller 1 (Master)
CONSEQUENCE
of ERROR only
on Chiller 2 to
8 (Slaves)
RECOMMENDED ACTIONS
E-23
Error in communication
between the fan board
and main board.
It only turns off the indicated unit.
Communication cable between
the fan board and main board.
E-24
High suction
temperature error (SUCT)
It only turns off the indicated unit.
The system won’t reset automatically.
Check/correct:
Suction temperature sensor.
Compressor operation
Refrigerant charge.
E-25
Low suction temperature
error (SUCT). Antifreeze
protection in the cooler
It only turns off the inverter compressor.
The unit does not restart automatically if
the error repeats 3x in less than two hours.
Check/correct:
Suction temperature sensor.
Lack of refrigerant.
Obstruction inside the cooling
circuit (plugged fi lters, valves, etc.)
Low water fl ow in the evaporator.
E-27
Error in communication
between units
Shuts off the system
Shuts off the
corresponding
slave unit.
Check for any disruption in
the communication cable
or loose connection on the
communication terminal.
E-28
Failure in the unit water
outlet sensor (ULWT)
It only turns off the indicated unit.
Check whether the sensor is
properly connected. Disconnect
and measure the sensor
ohmic resistance (250C - 5kΩ).
Replace faulty sensor.
E-29
Failure in the system
inlet water sensor (REWT)
or in the system outlet
water sensor (RLWT)
Turns off the system
Check whether the sensor is
properly connected. Disconnect
and measure the sensor
ohmic resistance (250C - 5kΩ).
Replace faulty sensor.
E-30
Faulty saturated
suction sensor (SST)
It only turns off the indicated unit.
Check whether the sensor is
properly connected. Disconnect
and measure the sensor ohmic
resistance (250C - 10kΩ).
Replace faulty sensor.
E-31
Low temperature error
Suction saturated
temperature (SST).
Antifreeze protection
in the cooler
It only turns off the inverter compressor.
The unit does not restart automatically if
the error repeats 3x in less than two hours.
Check/correct:
Saturated suction
temperature sensor.
Lack of refrigerant.
Obstruction inside the cooling
circuit (plugged fi lters, valves, etc.)
Low water fl ow in the evaporator
E-32
Error in the unit outlet
water temperature
(ULWT) outside the
allowable limits
Note: For start-up,
temperatures should be
between 5 and 35°C.
Turns off the compressors. If the
unit is turned off , it does not
allow compressor input.
The unit won’t reset automatically; if the
error repeats 3x in less than three hours.
Check/correct:
Outlet water temperature sensor.
Lack of refrigerant.
Obstruction inside the cooling
circuit (plugged fi lters, valves, etc.)
Low water fl ow in the evaporator
