Troubleshooting - Carrier AQUASMART 30EX Series Installation Operation & Maintenance

6. Maintenance & Repair (cont.)

6.9. Troubleshooting

ERROR
TYPE OF ERROR
CODE
Phase Sequence
E-01
Error
E-02
Phase failure
Faulty outdoor
E-03
sensor
Faulty sensor in
E-04
the middle of
the condenser
Faulty suction
E-05
sensor
Faulty discharge
E-06
sensor in
compressor 1
Faulty discharge
E-07
sensor in
compressor 2
Low suction
E-08
pressure
High discharge
E-09
pressure
54
CONSEQUENCE
of ERROR only on of ERROR only on
Chiller 1 (Master) Chiller 2 to 8 (Slaves)
No unit in the Only the unit with
system starts. error won't start.
No unit in the Only the unit with
system starts. error won't start.
It only turns off the faulty unit.
It only turns off the faulty unit.
It only turns off the faulty unit.
I only turns off the faulty compressor.
I only turns off the faulty compressor.
It only turns off the faulty unit.
The system resets automatically according
to pressure switch actuation.
It only turns off the faulty unit.
The system resets automatically according
to pressure switch actuation.
CONSEQUENCE
Turn off the unit with error. Check/
correct the phase sequence.
Turn off the unit with error. Check /
measure if there is voltage on the terminal
block. If not, establish voltage.
Check whether the sensor is properly
connected. Disconnect and measure
the sensor ohmic resistance (25°C -
10kΩ). Replace faulty sensor.
Check whether the sensor is
properly connected.
Disconnect and measure the sensor
ohmic resistance (250C - 10kΩ).
Replace faulty sensor.
Check whether the sensor is
properly connected.
Disconnect and measure the sensor
ohmic resistance (250C - 10kΩ).
Replace faulty sensor.
Check whether the sensor is
properly connected.
Disconnect and measure the sensor
ohmic resistance (25°C - 100kΩ).
Replace faulty sensor.
Check whether the sensor is
properly connected.
Disconnect and measure the sensor
ohmic resistance (250C - 100kΩ).
Replace faulty sensor.
With the unit running measure suction pressure.
Check pressure switch actuation. Replace
the component as necessary.
Check/correct leaks/obstructions
in the low circuit.
Evaporator cleaning. Replacement of
fi lter drier. Check refrigerant charge.
With the unit running, measure
discharge pressure.
Check pressure switch actuation. Replace
the component as necessary.
Check / correct obstructions in
the condenser/high circuit.
Condenser cleanliness. Check
refrigerant charge.
RECOMMENDED ACTIONS