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