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Haier CI0193AANB Installation, Operation And Technical Manual page 5

Air cooled semi-hermetic screw chiller
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2.5 Electric control
Adopt the PCB to control the operation.
The unit can realize remote operation
The control of water temperature will act according to the water outlet temperature.
The unit can realize compulsorily unit quantity control and compulsorily capacity control for the unit with
several compressors.
When failure occurs, the normal compressor can continue running (for the unit with several compressors).
When abnormal, the unit can monitor the current water temperature, operation time.
In operation, the unit can monitor the water temperature, capacity state, and operation time.
On the crystal touch screen, you can control the unit.
When abnormal, the failure information will display on the crystal touch screen automatically.
The unit can realize the interlock
Note: Do not damage the power cable.
The following items can be tested if abnormal: high pressure, low pressure, compressor motor coil
temperature, compressor discharging temperature, anti-freeze, reverse power supply, etc.
2.6 Safety Device
For the requirement of safety, there is solenoid valve on the discharging pipe to discharge the gas when the
pressure is too high. Must not install any stop valve on the pipe with safety relief valve.
The unit is equipped with safety device to confirm the safe operation. When one safety device acts, the
failure indicator will light, and the corresponding function will stop, while the other function is normal.
Suggestion: Once one section occurs abnormal phenomenon, you should shut off the unit to check
the reason to avoid the worse damage.
safety device
Delay time when
The interval time between
shut off
compressor stops and restart up
High pressure
Discharging pressure protection
sensor
Water temperature
Anti-freezed protection for chilled
sensor
water
Discharging
Discharging temperature
temperature
protection
sensor
Motor overheat
Compressor motor protection
protection
Low pressure
Suction pressure protection
sensor
Reverse phase
Compressor motor reverse protection
protection
Compressor motor over current
Over current relay
protection
and passive element starup/stop control
and remote control
Protection point
between the cooling
Set value
15minutes
Compressor startup/stop frequently
Refrigerant charged too much
Ambient temperature too high
2.4Mpa
Condenser blocked, bad ventilation
Non-condensing gas in system
Chilled water temperature too low
5℃
Set temperature too low
Because of leakage, refrigerant too little
in:100±2.5℃
Solenoid valve of compressor heat exchanging pipe
out:89±2.5℃
shut off because of failure
Stop valve on condenser outlet shutoff
in:105±5℃
Identical with high pressure switch (high
out:88±11℃
pressure protection)
Expansion valve shutoff because of failure
0.35Mpa (cooling)
Stop valve on condenser outlet shutoff
0.1Mpa (heating)
Chilled water flow too low
Evaporator blocked
Phase
sequence
Power wiring incorrect
correct
According to the
Motor over current
compressor
5
HAIER CHILLER
.
/
cold water pump and the
Action reasons
master
unit
.

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