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Controller Specs; Malfunction And Troubleshooting - Haier CA0070AANB Installation & Operation Manual

Air cooled module water chiller
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start up; if water outlet temperature is lower or equal 2℃, one module will start up in heating, until the water
temperature reaches 8℃, it will stop heating and quit the anti-freezed mode.

17. Controller specs

Rated working voltage: 220±20% VAC; power consumption<10VA.
Ambient temp.: -15~60℃; relative humidity≤90%, no dew.
Working mode: continuous operation.
Average non-malfunction working time:>5000hrs.
Control board external dimension: (L*W*H):165*105*28mm.
Panel dimension of wired controller (L*W*H): 160*98*11.5mm.

18. Malfunction and troubleshooting

Malfunction
Wired controller can
not start up
Unit can not start up
after start up a long
time
Suction pressure is
too high
Suction pressure is
too low
Compressor running
is too long, or not
Probable reasons
1.Phase sequence of the main power
is wrong
2.The voltage of main power does not
meet the request
3.The
communication
connected badly
1.The set temperature is too high
2.The water outlet temperature sensor
is damaged or not fixed well
3.The wired controller is set as the fan
coil simultaneous control, but in fact it
do not adopt this mode
4.Control wire is fixed well
1. Thermal load is too big
2. Open degree of expansion valve
is too large
1.Lack of refrigerant
2. Open degree of expansion valve is
too little
3.Pipe or filter drier is blocked
4.Evaporating water is too low
5.Evaporator is too dirty
1.Load is too big
2.Temperature is adjusted too low
1.Change the phase sequence of
the main power
2.Adjust the voltage of the main
power
wire
is
3.Connect the communication wire
again
1.Lower temperature
2.Press the sensor firmly or change
the sensor
3.Cancel the fan coil simultaneous
control function
4.Press the control wire firmly
1.Lower load
2.Change expansion valve
1.Check the leakage point, recharge
refrigerant
2.Change expansion valve
3.Clean pipeline, change the filter
drier
4.Adjust the water flow or check the
load
5.Clean the dirty
1.Check the reason of overload, add
the capacity
HAIER CHILLER
Solution

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