S&A CWFL-3000 User manual

CWFL-3000/4000/6000
FIBER LASER SPECIAL CHILLER
USER MANUAL

CWFL-3000/4000/6000 Series
Contents
<1> Cautions ----------------------------------------------------------------------------- 3
<2> Contour and parts introduction --------------------------------------------- 4
<3> Installation ------------------------------------------------------------------------- 5
<4> Unit introduction and parameters adjustment ------------------------- 6
<5> Alarm and communication output -------------------------------------------11
<6> MODBUS RS-485 communication function ----------------------------- 12
<7> Simple troubleshooting -------------------------------------------------------- 16
2

CWFL-3000/4000/6000 Series
Thank you for using the machine from GUANGZHOU TEYU
ELECTROMECHANICAL CO., LTD. Please read the installation instructions
carefully before installing and operating and keep it properly.
This installation instructions is not a quality assurance. GUANGZHOU TEYU
ELECTROMECHANICAL CO., LTD reserves the right to the interpretation
of correction of typographical errors, improper mentioned information and product
improvement. The amended content will be reprinted in installation instructions
without notice in advance.
<1> Cautions
1. Please ensure that the power supply and electrical outlet are in good contact
and the earth wire must be firmly grounded!
2. Please make sure there is stable and normal voltage for the working chiller!
As the refrigeration compressor is more sensitive to the power supply and
voltage, so the operating voltage of our standard product is ±10％of the rated
voltage. If you do need a wider operating voltage range, customization is
available for us.
3. Unmatched power frequency can cause the chiller damage!
Please choose model of 50Hz or 60Hz according to actual circumstance.
4. To protect the pump, it’s strictly forbidden to run the chiller without water in the
storage water tank!
The new machine is packed after draining whole water in the tank, so please
make sure the tank has water inside before machine starting, otherwise it’s
easily to have the pump damaged. When the water level is below the green
(NORMAL) range of the water level gauge, the cooling capacity of our chiller
will go down slightly. Hence please ensure the water level is within the green
(NORMAL) range. To drain through circulating pump is strictly prohibited!
5. Please be sure that the air inlet and air outlet are in good ventilation!
There must be at least 50cm from obstructions to the air outlet which is in the
back of the cooler, and should leave at least 30cm between obstructions and
the side air inlet.
6. The filter gauze must be regularly cleaned!
It’s essential to remove and wash the dust gauze regularly, otherwise chiller
malfunction can be caused by serious blockage.
7. Please pay attention to the effect of the condensate water!
With greater ambient humidity, when the water temperature is lower than the
ambient temperature, the condensate water will generate on the surface of
water circular pipes and the cooled components. If above circumstance
appears, it is recommended to set a higher water temperature or keep pipes
and cooled parts warm.
8.This product is an industrial equipment.For professional use only.
3

CWFL-3000/4000/6000 Series
<2> Contour and parts introduction
AIR INLET
(FILTER GAUZE)
POWER SUPPLY
ALARM OUTPUT
WATER OUTLET (H)
WATER INLET (H)
OVERFALL GAP
FILTER
AIR OUTLET
WATER INLET (L)
WATER OUTLET (L)
WATER LEVEL GAUGE
DRAIN
WATER SUPPLY
INLET
POWER SWITCH
TEMPERATURE
CONTROLLER
WATER PRESSURE
GAUGE
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CWFL-3000/4000/6000 Series
<3> Installation
It is very simple to install this industrial cooling machine. The installation for the
first time of the new machine can be carried out by following steps:
1. Open the package to check if the machine is intact and all the necessary
accessories are completed.
2. Open the water supply lid to feed cooling water.
Observing the water level gauge to feed water slowly, be careful not to have the
water overflowed!
3. According to system conditions, please connect the water inlet and outlet pipe
properly.
4. Plug in power, turn on the power switch. (Do not start up without water in the
water tank!)
(1) Power switch turned on, the circulation pump of the chiller starts working. The
first time of operating may cause more bubbles in the pipe leading to a flow
alarming occasionally, but running for a few minutes later, it will go back to
normal.
(2) If the chiller starts for the first time, you must immediately check whether the
water pipe leaks.
(3) Power switched on, if the water temperature is under the set value, it is normal
that fans and other components of the machine do not work. The temperature
controller will automatically control the working conditions of the compressor,
magnetic valve, fans and other parts based on the set controlling parameters.
(4) As it takes a longer time to start over the compressor and other components,
according to different conditions, the time is range from seconds to minutes, so
do not turn on and off frequently.
5. Check the water level in the water tank.
The first starting up of a new chiller will empty the air in the water pipe, causing
a slight water level decline, but in order to keep the water level in the green area,
it is allowed to add adequate water again. Please observe and record the current
water level, and inspect it again after the chiller running for a period of time, if
the water level drops obviously, please re-inspect the water pipeline leakage.
6. Adjust parameters of temperature controller.
CWFL-3000/4000/6000 series use an new intelligent controller. It works in
defaulted constant temperature control mode for the low temperature end with
water temperature set at 25℃which can be adjusted as needed. The high
temperature end works in intelligent control mode and it will self-adjust
controlling parameters according to the ambient temperature changes.
Normally users do not need to adjust the parameters. If it is necessary, please
refer to page 6 , “Unit introduction and parameters adjustment.”
5

CWFL-3000/4000/6000 Series
<4> Unit introduction and parameters
adjustment
(1) The unit use wire LCD temperature controller to realize more precise
temperature control and stronger capacity of resisting disturbance. It supports
MODBUS-485 communication with transmission distance up to 1.2km;
(2) It has water line anti-icing function. Under standby condition, it functions
when the room temperature is below 5℃;
(3) It has water tank heating function;
(4) It has water line actual flow monitoring function;
1. Temperature control panel introduction and parameters adjustment
(1) The control panel has LCD screen with 7 system operation buttons which are
Language Switching-button (Lang), UP-button (▲), Down-button (▼), Power-button
Set-button (Set), Quick Set-button (Quick Set) and Quit-button (Quit). Turn off
the chiller by pressing the Power-button for 3 sec while other operations can be
completed by short press.
(2) User parameters quick-adjusting: under normal operation condition, press
Quick Set-button to set the user menu. When it displays the set item, press Quick
Set to enter into parameter adjustment interface. Press ▲ or ▼ to to switch the
parameter items. If the parameters need to be modified, press Quick Set-button to
enter into parameter values and press ▲ or ▼ to adjust it. Save the values and
return to parameter quick setting interface by pressing Quit-button when the
adjustment is completed. If there is no more action within 15 sec, it will
automatically exit modifying status with modified parameters saved.
(3) User menu: under normal operation condition, press Set-button for 5 sec to
show user input password interface. Input “168” by pressing ▲ or ▼, then press
Set-button to enter into User menu to set the parameters. If the password is
6

CWFL-3000/4000/6000 Series
incorrect, it will quit the setting interface and turn to normal operation interface.
The default password 168 must be kept well. The user menu can not be accessed if
the password is forgotten and no backup password is available.
Under user menu, in parameter items interface, press ▲ or ▼ to switch the
items. If the parameters need to be modified, press Set-button to enter into
parameter values and press ▲ or ▼ to adjust it. Save the values and return to
parameter interface by pressing Set-button and press Quit-button to quit the user
menu. If there is no more action within 15 sec, it will automatically exit modifying
status with modified parameters saved.
(4) Check the history failure records: under normal operation condition, press
Set- button and ▲ for 5 sec to access password input interface. Input password
“123” and confirm by pressing Set-button, it will be in failure view status if the
password is correct, if not, it will quit. When the system is under failure records
viewing, it will show the first failure record and code. Press ▲ or ▼ can look over
the failure records and press Quit-button to quit the failure viewing status.
(5) Restore factory settings: under normal operation condition, press and hold
Set-button and Power-button for 10 sec to have the password input interface
popped up then input password “615” to enter into administrator setting
parameters restoration function, and it will display “RECOVERY SUCCESS” and
turn to operation condition after 2 sec. If the password is incorrect, it will quit the
password input interface and turn to operation condition.
(6) Unit operation condition query: the screen will display the operation
conditions of the compressor, water pump and the indoor exhaust temperature
parameters, etc. by pressing Quick Set-button and ▲ at the same time and release
them. Press ▲ or ▼ for page turning and it will automatically exit after displaying
for 5 sec.
(7) Clock adjustment: under normal operation condition, press Quick
Set-button for 5 sec to access clock adjustment interface with time/year flashing.
Press ▲ or ▼ to adjust year and confirm by pressing Quick Set-button; with time
flashing, press ▲ or ▼ to adjust hour and confirm by pressing Quick Set-button;
with minute flashing, press ▲ or ▼ to adjust minute and save the clock setting by
pressing Quick Set- button.
(8) Language switching: the system default language is Chinese. For switching
to English, press Lang-button and the system will change the Chinese interface to
English interface as default language.
(9) Forced refrigeration: under normal operation condition, press ▲ or ▼ at the
same time for 5 sec to activate forced refrigeration function. Press Power-button
can stop the machine and cancel forced refrigeration function.
7

CWFL-3000/4000/6000 Series
2. Detailed parameter setting is as below table
Order Code Set item Range Factory
setting Remark illustration Register
address
1 F1 Set temp. F10～F9 /
-20～40 25 Intelligent mode /
Constant temp mode setup menu
of low temp
system
0x0401
2 F2 Temp. difference values -15～5 -2 0x0402
3 F3 Cooling hysteresis 0.1～3.0 0.8 0.1 resolution ratio 0x0403
4 F4 Way of control 0～1 0 0 Constant,
1 Intelligent 0x0404
5 F5 Set temp. F7～F6 /
-20～40 30 Intelligent mode /
Constant temp mode setup menu
of high
temp
system
0x0405
6 F6 Temp. difference values -15～5 -2 0x0406
7 F7 Cooling hysteresis 0.1～3.0 1 0.1 resolution ratio 0x0407
8 F8 Way of control 0～1 1 0 Constant,
1 Intelligent 0x0408
9 F9 The highest set temp.
（
F10+1）～ 40 35 Constant temp. mode
Common in
high&low
Temp
systems
0x0409
10 F10 The lowest set temp. 1～（F9-1）20 Min. 1, Constant
temp. mode invalid 0x040a
11 F11 Ultra-high room temp. alarm 40～50 45 0x040b
12 F12 Ultra-high water temp. alarm 1～20 10 0x040c
13 F13 Ultra-low water temp. alarm 1～60 15 0x040d
14 F14 Temp. alarm delay 0～30 5 Minute 0x040e
15 F15 Sensor failure alarm delay 0～180 10 Second 0x040f
16 F16 Water flow detection delay
of machine startup 0～180 5 Second 0x0410
17 F17 Flow alarm delay 0～180 2 Second 0x0411
18 F18 Heating hysteresis 0～10 0.8 0.1 resolution ratio 0x0412
19 F19 Water pump stop delay 0～180 5 Second 0x0413
20 F20 Startup delay 0～180 30 Second 0x0414
21 F21 Compressor activate
protection 0～180 90 Second 0x0415
22 F22 Turn on setting of phase
sequence protection On off / Single-phase OFF /
three-phase ON 0x0416
23 F23
Turn on setting of external
input function
(startup and standby)
On off off 0x0417
24 F24 NO and NC setting of external
input function NO / NC NC NO-normally opened /
NC-normally closed 0x0418
25 F25 External input activation delay 0～180 0 Second 0x0419
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CWFL-3000/4000/6000 Series
26 F26 External input standby
activation delay 0～180 0 Second 0x041a
27 F27 Conductivity alarm activation
setting On off /
With conductivity ON /
Without conductivity
OFF
0x041b
28 F28 Ultra-high conductivity alarm
setting value 0.5～100 10 μs/cm 0x041c
29 F29 Relay NO/NC setting under
lower limit of conductivity NO/NC NC NO-normally opened
NC-normally closed 0x041d
30 F30 Relay output setting under
lower limit of conductivity 0.5～100 2.5 μs/cm 0x041e
31 F31 Ultra-low conductivity alarm
setting value 0.5～100 2 μs/cm 0x041f
32 F32 Self-starting after being
electrified On off off 0x044d
33 F33 Key lock of Chiller On/Off 0-1 1 0：lock，
1：unlock 0x0450
NOTE:
(1) In parameter setting status, the system runs under original parameters;
(2) Under Constant Temperature control mode (“ F4” and “F8” set at 0), water
temperature is controlled by “F1” and “F5”;
(3) Under Intelligent Control mode (“ F4” and “F8” set at 1), water temperature
is self-adjusting according to ambient temperature. The temperature difference
is controlled by “F2” and “F6”.
(4) The low temp section and high temp section of the chiller can be set
different control modes.
3. Failure warning processing mode
When alarm occurs, the failure alarm code will be displayed on the upper right
corner of the LCD screen. In alarming state, the alarm sound could be
suspended by pressing any button, but the alarm display remains until the
alarm condition is eliminated.
4. Failure code table
Failure
code Description Alarm
phenomenon Alarm action Elimination
method
E00 Communication
failure alarm
E00 shown with
alarm sound None
Automatic clearing
after mainboard
and operation panel
are connected well
E01 Low temp. system
flow alarm
E01 shown with
alarm sound
The compressor, condenser fans
and heater of the high/low
temp. system shut down
Automatic clearing
9

CWFL-3000/4000/6000 Series
E02 High temp. system
flow alarm
E02 shown with
alarm sound
Heater of the high temp. system
shut down Automatic clearing
E03 Ultra-high room
temp.alarm
E03 shown with
alarm sound
Each refrigeration part runs under
usual procedures Automatic clearing
E04
Low temp. system
ultra-low water temp
alarm
E04 shown with
alarm sound
The compressor, condenser fans
and heater of the high/low temp.
system shut down
Automatic clearing
E05
Low temp. system
ultra-high water temp
alarm
E05 shown with
alarm sound
Each refrigeration part runs under
usual procedures Automatic clearing
E06
High temp. system
ultra-low water temp
alarm
E06 shown with
alarm sound
Each refrigeration part runs under
usual procedures Automatic clearing
E07
High temp. system
ultra-high water temp
alarm
E07 shown with
alarm sound
Heater of the high temp. system
shut down Automatic clearing
E08 Wrong phase and
lacking phase alarm
E08 shown with
alarm sound
The water pump, compressor,
condenser fans and heater of the
high/low temp. system shut down
Manual clearing
E09 Compressor overload
alarm
E09 shown with
alarm sound
The compressor, condenser fans
and heater of the high/low temp.
system shut down
Manual clearing
E10 Low temp. water
pump overload alarm
E10 shown with
alarm sound
The water pump, compressor,
condenser fans and heater of the
high/low temp. system shut down
Manual clearing
E11 High temp. water
pump overload alarm
E11 shown with
alarm sound
The water pump and high temp.
system heater shut down Manual clearing
E12 Refrigeration system
high pressure alarm
E12 shown with
alarm sound
The compressor and condenser fans
shut down Manual clearing
E13 Refrigeration system
low pressure alarm
E13 shown with
alarm sound
The compressor and condenser fans
shut down Automatic clearing
E14 Room temp. sensor
failure alarm
E14 shown with
alarm sound
Switched to constant temp. mode
and each refrigeration part runs
under usual procedures
Automatic clearing
E15
Low temp. system
water temp. sensor
failure alarm
E15 shown with
alarm sound
The water pump, compressor,
condenser fans and heater of the
high/low temp. system shut down
Automatic clearing
E16
High temp. system
water temp. sensor
failure alarm
E16 shown with
alarm sound
High temp. system water pump and
heater shut down Automatic clearing
E17 Ultra-high conductivity
alarm
E17 shown with
alarm sound
Each refrigeration part runs under
usual procedures Automatic clearing
E18 Ultra-low conductivity
alarm
E18 shown with
alarm sound
Each refrigeration part runs under
usual procedures Automatic clearing
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CWFL-3000/4000/6000 Series
E19 Ultra-low water level
alarm
E19 shown with
alarm sound
The unit runs normally under set
values; the water pump, compressor,
condenser fans and heater of the
high/low temp. system shut down
Automatic clearing
E20 Exhaust temp. sensor
failure alarm
E20 shown with
alarm sound
Each refrigeration part runs under
usual procedures Automatic clearing
E21 Ultra-high exhaust
temp. alarm
E21 shown with
alarm sound
Each refrigeration part runs under
usual procedures Automatic clearing
<5> Alarm and communication output
For ensuring the equipment will not be damaged when abnormal condition occurs
in the chiller, it has alarm protection function.
1. Alarm and MODBUS RS-485 communication output wiring diagram.
2. Working condition table of alarm signal
Unit condition Built-in buzzer of
temp. controller
OUT
H1
、
H2
OUT
H1
、
H3 ILUS
Working normally No Sound Disconnection Breakover
E00、E01、E08、E09、
E10、E12、E13、E15 Sounds Breakover Disconnection
E02、E03、E11、E14、E16
、
E17、E18、E20、E21 Sounds Disconnection Breakover
E04、E05、E06、E07 Sounds Breakover Disconnection Optional
E19 Sounds Breakover Disconnection Activate after output
terminal delaying
Note: The flow alarm is connected to the normally open relay and normally closed relay
contacts, requiring operating current less than 5A, working voltage less than 300V.
11

CWFL-3000/4000/6000 Series
<6> MODBUS RS-485 communication
function
This system adapts salve mode of MODBUS-RTU communication,9600 baud rate,
no parity checking,8 data bit,1 stop bit and support MODBUS-RTU 03 (Read
Holding Registers) and 06 (Read Holding Registers) commands. Communication
formats are as below:
1. Command format 03
Host send command
Function code 1 bytes 0x03
Initial address 2 bytes From 0x0400 to 0x044a, From 0x0100 to 0x0108,
From 0x0800 to 0x0803
Register number 2 bytes From 1 to 10
Slave response
Function code 1 bytes 0x03
Number of bytes 1 bytes 2*N（"N" is the number of registers ）
Register value N*2 bytes
Error
For example: if the host’s sending address is 1, requests 108-110 command of
slave read register and send 01 03 00 6B 00 03 XX YY,thereinto,01 as slave address,
03 as function code, 00 6B as initial address, 00 03 as register number and XX YY
as the result of CRC verification.
Slave response: 01 03 06 02 2B 00 00 00 64 XX YY, thereinto, 01 as slave address,
03 as function code, 06 as number of bytes, 02 2B 00 00 00 64 corresponding to the
values in 108-110 of register respectively and XX YY as verification code.
If the slave receives wrong data, return to data 01 83 01 XX YY, thereinto, 01 as
slave address. 83 as error code, 01 as exception code and XX YY as check sum.
2. Command format 06
Host send command
Function code 1 bytes 0x06
Register address 2 bytes From 0x0400 to 0x044a
Register value 2 bytes From 0x000 to 0xffff
Error code 1 bytes 0x83
Exception code 1 bytes 01 or 02 or 03 or 04
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CWFL-3000/4000/6000 Series
Slave response
Error
For example: if the host’s sending address is 1, requests command of writing data
00 03 to register 2. Host send: 01 06 00 02 00 03 XX YY, thereinto, 01 as slave
address, 06 as function code, 00 02 as register address, 00 03 as written data and XX
YY as verification code.
Slave response: 01 06 00 02 00 03 XX YY, thereinto, 01 as slave address, 06 as
function code, 00 02 as register address, 00 03 as written data and XX YY as CRC
verification code.
If there is data error or communication exception, send 01 86 02 XX YY.
3. Read only parameter（sensor, current）
Read-only
Register
address Description Range Default Unit Data
resolution Symbol
0x0100 Room temp. sensor
temperature -25 ~ 100 ℃0.1/bit yes
0x0101 Water temp. sensor
temperature(Low temp) -25 ~ 100 ℃0.1/bit yes
0x0102 Water temp. sensor
temperature(High temp) -25 ~ 100 ℃0.1/bit yes
0x0103 Compressor exhaust
temperature -25 ~ 140 ℃0.1/bit yes
0x0104 Flow of the first waterway 0.1-200 L/Min 0.1/bit yes
0x0105 Flow of the second waterway 0.1-200 L/Min 0.1/bit yes
0x0106 Conductivity 0.1-500 μs/cm 0.1/bit yes
0x0107 Compressor current
（Three-phase average）0-50 A 0.1/bit yes
0x0108 Low temp. water pump current 0-50 A 0.1/bit yes
0x0109 High temp. water pump current 0-50 A 0.1/bit yes
Function code 1 bytes 0x86
Register address 2 bytes From 0x0400 to 0x044a
Register value 2 bytes From 0x000 to 0xffff
Error code 1 bytes 0x86
Exception code 1 bytes 01 or 02 or 03 or 04
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CWFL-3000/4000/6000 Series
4. Read only parameter（state）
Read-only
Register
address Description Bit definition
0x0800 Relay output
status
MSByte
Bit7(MSb) Retain
Bit6 Retain
Bit5 Retain
Bit4 Retain
Bit3 Retain
Bit2 Alarm output relay 0：Off 1：On
Bit1 Conductivity lower limit relay 0：Off 1：On
Bit0(LSb) High temp. heating rod 0：Off 1：On
LSByte
Bit7(MSb) High temp. water pump relay 0：Off 1：On
Bit6 High temp. refrigeration relay 0：Off 1：On
Bit5 Compressor crankcase
heating 0：Off 1：On
Bit4 Low temp. heating rod 0：Off 1：On
Bit3 Low temp. refrigerant
solenoid valve 0：Off 1：On
Bit2 Condensing fan 0：Off 1：On
Bit1 Compressor relay 0：Off 1：On
Bit0(LSb) Low temp. water pump 0：Off 1：On
0x0801 Digital input
switch status
MSByte
Bit7(MSb) Retain
Bit6 Retain
Bit5 Retain
Bit4 Retain
Bit3 Retain
Bit2 Retain
Bit1 Retain
Bit0(LSb) Retain
LSByte
Bit7(MSb) Retain
Bit6 Retain
Bit5 External input 0：No input 1：Input
Bit4 Refrigerant low pressure 0：No input 1：Input
Bit3 Refrigerant high pressure 0：No input 1：Input
Bit2 Spare 2 0：No input 1：Input
Bit1 Spare 1 0：No input 1：Input
Bit0(LSb) Water level 0：No input 1：Input
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CWFL-3000/4000/6000 Series
0x0802
Alarm status
（high 16-bit）
MSByte
Bit7(MSb) Retain
Bit6 Retain
Bit5 Retain
Bit4 Retain
Bit3 Retain
Bit2 Retain
Bit1 Retain
Bit0(LSb) Retain
LSByte
Bit7(MSb) Write administrator
parameter error 0：Correct 1：Error
Bit6 Write user parameter error 0：Correct 1：Error
Bit5 Ultra-high exhaust temp.
alarm 0：No alarm 1：Alarm
Bit4 Exhaust temp. sensor failure
alarm 0：No alarm 1：Alarm
Bit3 Ultra-low water temp alarm 0：No alarm 1：Alarm
Bit2 Ultra-low conductivity alarm 0：No alarm 1：Alarm
Bit1 Ultra-high conductivity alarm 0：No alarm 1：Alarm
Bit0(LSb) High temp. system water
temp. sensor failure alarm 0：No alarm 1：Alarm
0x0803 Alarm status
（low 16-bit）
MSByte
Bit7(MSb) Low temp. system water
temp. sensor failure 0：No alarm 1：Alarm
Bit6 Room temp. sensor failure 0：No alarm 1：Alarm
Bit5 Refrigeration system low
pressure 0：No alarm 1：Alarm
Bit4 Refrigeration system High
pressure 0：No alarm 1：Alarm
Bit3 High temp. water pump
overload 0：No alarm 1：Alarm
Bit2 Low temp. water pump
overload 0：No alarm 1：Alarm
Bit1 Compressor overload 0：No alarm 1：Alarm
Bit0(LSb) Wrong phase and lacking
phase 0：No alarm 1：Alarm
LSByte Bit7(MSb) High temp. system ultra-high
water temp 0：No alarm 1：Alarm
5. Read/Write Registers(Use only when the external input
function is turned off)
Register address Description Range Default Unit Remark Symbol
0x0804 Chiller On/Off 0-1 -- 0：On，1：Off No
15

CWFL-3000/4000/6000 Series
<7> Simple troubleshooting
Failure Failure Cause Approach
Machine turned on but unelectrified
Power cord is not plugged in place
Check and ensure the power interface
and the power plug is plugged in place
and in good contact
Fuse burnt-out
Open the electric box cover, check the
protective tube, replace with spare one
if necessary and check whether the
power supply voltage is stable; Check
and ensure the power interface and
the power plug are in good contact
Flow Alarm
(controller displays E01 or E02) use a
water pipe directly connect to the
water outlet and inlet but still without
water flowing
Water level in the storage water tank is
too low
Check the water level gauge display,
add water until the level shown in the
green area;And check whether water
circulation pipe leaks
Flow alarm occurs while running with
other equipment (controller displays
E01 or E02), but there is water flowing
and no alarm when use a water pipe
directly connected to the chiller water
outlet and inlet.
Water circulation pipes are blocked or
a pipe bending deformation. Check water circulation pipe
Ultra-high temperature
alarm(controller displays E05 or E07)
Blocked dust gauze, bad thermolysis Unpick and wash the dust gauze
regularly
Poor ventilation for air outlet and inlet To ensure a smooth ventilation
for air outlet and inlet
Voltage is extremely low or astable To improve the power supply circuit or
use a voltage regulator
Improper parameter settings on
thermostat
To reset controlling parameters or
restore factory settings
Switch the power frequently
To ensure there is sufficient time
for refrigeration
(more than 5 minutes)
Excessive heat load Reduce the heat load or use other
model with larger cooling capacity
Alarm for ultra-high room
temperature(controller displays E03)
The working ambient
temperature is too high for the chiller
To improve the ventilation to guarantee
that the machine is running under
40℃.
Serious problem of condensate water Water temperature is much lower than
ambient temperature, high humidity
Increase water temperature or
to preserve heat for pipeline
Water drains slowly from outfall during
water changing Injection port is not open Open the injection port
16