Kaffe SD550A User manual

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Specification
Power Supply：AC220V 50/60Hz
Fan load power: <100W
Fan Valve load power: <100W
Compressor load power: <500W
Power Consumption: <3W
Housing material：ABS+PC
Installation：Standard 86
Wire Connection：Terminal Crimping
Working environment：0～50℃, 5%～95%RH
Storage environment: -10～55℃, 5%～95%RH
Operation Guide
：Wind speed setting/timing defrosting setting/confirmation key；
：Operating mode setting/manual valve switch setting/menu key;
: On/off key : Humidity setting/up key；
:Humidity setting/filter setting and zero/down button； + :Lock and unlock key；
+ :Check the outdoor temperature and humidity key； + :Local time setting key；
+ :Timing switch key； + ：Setting key for humidity deviation value；
+ ：Restore the factory settings key； + :Mute key；
+ : Filter and coil temperature check key；
SD550A User Manual
The new liquid crystal dehumidification controller can collect
environmental temperature and humidity data, according to the
current environmental conditions, to achieve intelligent control
of dehumidifier.
The controller adopts large screen digital display technology,
can manually switch on/off, can manually adjust the fan wind
speed and set humidity to control the work of the compressor,
improve indoor air environment, comfort and energy saving.

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1. Controller on/off: After correctly connecting the power according to the wiring diagram, the
controller defaults to the off state, and the LCD screen displays OFF. Press the key to turn on the
controller, and the LCD screen displays parameter information such as indoor temperature and humidity.
Press the key again in the power on state to enter the power off state of the controller.
2. Working mode setting: When turned on, press the key to switch the working mode to ventilation
mode or dehumidification mode; If set to dehumidification mode, enter the humidity setting state and
set the humidity value with the or keys. Press the key or waiting 10 seconds without any key
operation, and the system will automatically confirm and return to the startup interface, displaying the
corresponding mode icon.
3. Time setting: When turned on, press and hold the +button for more than 3 seconds to enter the
local time setting state. First, modify the week, which flashes; Press the key repeatedly, and the flashing
position will switch between week, hour, and minute. In the time setting state, use the key or to
modify the corresponding value. After the time modification is completed, press the key to save the
current time and exit the set state.
4. Wind speed setting: When turned on, press the key to enter the wind speed setting interface, and
modify the set wind speed through the or keys. Pressing the confirm button or 10 seconds of
keyless operation will automatically confirm and return to the startup interface. The fan will operate at
the set wind speed.
5. Timing defrosting setting: In the startup state, press and hold the key for 3 seconds to enter the
timing defrosting setting state. Firstly, set the compressor running time P1 and display the timing
defrosting serial number flag 1. Set the compressor running time through the or key, confirm with
the key, and enter the compressor stop time P2 setting. Display the timing defrosting serial number flag 2.
Set the compressor stop time through the or key, confirm with the key , and return to normal
working state. (Note: When the running time of the compressor is set to>0, timed defrosting will only
take effect, otherwise it will operate as automatic defrosting.)
6. Manual valve switch setting: In the startup state, press and hold the key for 3 seconds to manually
open/close the valve. When the indoor (return air) humidity sensor malfunctions or the humidity exceeds
75%, the valve is forced to close. When the indoor (return air) humidity drops below 60% again, the valve
resumes normal operation. When the valve is opened, the valve symbol is displayed.
7. Timing on/off setting: In the on/off state, press the +key simultaneously to enter the timing
on/off setting interface. Use the or key to set the timer on/off countdown (setting range: 0-24
hours, default: 0). Pressing the key or 10 seconds of keyless operation will automatically confirm and
return to the previous interface. The device will start countdown.
8. Humidity setting: In the dehumidification mode, press the or keys to enter the humidity setting
interface, and modify the humidity setting value through the or keys. Pressing the button or

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operating without a button for 10 seconds will automatically confirm and return to normal working
status.
9. Humidity calibration setting: When the machine is turned on, press and hold the +button for 3
seconds to enter the indoor humidity calibration setting. The calibration value and humidity calibration
serial number symbol 1 will flash, and the humidity calibration value can be modified by pressing the
or keys. The button will switch to the outdoor humidity calibration setting, and the calibration
value and humidity calibration serial number symbol 2 will flash. After the setting is completed, the
button or 10 seconds of no button operation will automatically confirm and return to normal working
status.
10. Unlock setting: In the on/off state, press and hold the +button for 3 seconds to switch between
unlock and add. Lock status display lock flag;
11. Filter setting and resetting: When the machine is turned on, press and hold the key for 3
seconds. If the current filter alarm is turned on, reset the filter screen. The filter screen logo on the work
interface disappears, and the filter screen starts counting from zero; If the current filter alarm is in the
closed state, it enters the filter setting state and flashes to display the current filter setting value. Use the
or keys to modify the filter setting value, with a range of 0-360 days and a default value of 42 days.
Press the key or no key operation for 10 seconds, it will automatically confirm and return to normal
working state.
12. Filter and coil temperature viewing: When turned on, press and hold the +button for 3 seconds
to enter the filter screen viewing interface, which displays the current cumulative number of filter days.
Press the key to switch to the next coil temperature viewing interface, which displays the coil
temperature. Press the key again or operate without a button for 10 seconds, and it will automatically
return to the startup interface.
13. Outdoor temperature and humidity check: When turned on, press and hold the +button for 3
seconds to enter the outdoor temperature and humidity check status, which flashes to display the
outdoor temperature and humidity parameters. If there is no button operation for 10 seconds, it will
automatically return to normal working state. (Note: If there is no external outdoor temperature and
humidity module, this button function is invalid.)
14. Key tone setting: In the power-on state, press and hold +simultaneously.
15. Restore factory settings: When turned on, press and hold the +key to restore the product
parameters to the factory default settings. After setting, the screen will display for a few seconds and
then enter the shutdown state, indicating successful setting. Normal use after startup.
16. Fault alarm: When the coil sensor fails, the coil temperature viewing interface displays an E1 icon;
When the indoor humidity sensor fails, the humidity display area displays E2. When the indoor

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temperature sensor fails, the temperature display area displays E3. When the outdoor temperature and
humidity sensor fails, the humidity display area flashes E2, and the temperature display area flashes E3;
When a low pressure alarm occurs, the humidity display area displays E5; When a high voltage alarm
occurs, the humidity area displays E6; Display E8 when phase sequence alarm occurs
15.
Instruction
1. Wind speed control:
The wind speed is controlled by manual setting the wind speed, the wind speed defaults to low speed
operation, after the equipment starts the fan and the valve, after the compressor, after the shutdown, the first
compressor and the valve, then delay for 3 minutes before turning off the fan.
2. Valve Control:
Dehumidification mode: when the indoor (return) humidity < 60% , the valve open execution, when the indoor
(return) humidity > 75% , the valve closed execution. In ventilation mode: valve is always open. Off State:
closed valves, compressors, fans.
3. Compressor control:
If the humidity setting is greater than 10% and the indoor humidity sensor is normal:
When the indoor humidity is ≥ the set humidity+3%, turn on the compressor; (Note: After the compressor is
turned off, it must take 3 minutes to restart.)
When the indoor humidity+1% ≤ the set humidity, turn off the compressor; (Note: After starting the
compressor, it will not shut down due to humidity changes within 3 minutes).
If the humidity is set to 10% or the humidity sensor malfunctions:
The equipment enters a continuous dehumidification state and starts the compressor.
4. Defrosting control:
If the running time of the compressor for timed defrosting is set to 0, operate according to automatic
defrosting:
When the room temperature is ≤ 16 ℃, the compressor operates for 20 minutes and turns off for 10 minutes
for defrosting control;
When the room temperature is greater than 16 ℃, the compressor runs continuously for 20 minutes and the
coil temperature is ≤ 2 ℃ for 3 consecutive minutes, entering the defrosting stage, the compressor is forced
to shut down, and the compressor icon flashes; When the defrosting time exceeds 10 minutes and the coil
temperature is ≥ 5 ℃ for 3 consecutive minutes, exit the defrosting stage and the compressor returns to
normal operation.
(Note: When the coil temperature sensor malfunctions, the compressor operates for 15 minutes and turns off
for 10 minutes for defrosting control.)
If the running time of the compressor for timed defrosting is set to>0, operate according to timed defrosting:
When the continuous running time of the compressor is ≥ the set running time P1 for timed defrosting, the
compressor shuts down and enters the defrosting stage;
When the continuous stop time of the compressor is ≥ the set stop time P2 for timed defrosting, the

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compressor returns to normal and exits the defrosting stage.
(Note: The priority of defrosting operation is higher than the normal control operation of the compressor.)定的
5. High and low voltage protection (optional function):
If a low voltage alarm, high voltage alarm, or phase sequence alarm occurs, all output devices will stop
outputting, and the humidity display area will display the low voltage alarm icon E5, high voltage alarm E6, or
phase sequence protection alarm E8.
(Note: (a): If a high pressure alarm is detected for 10 seconds, the high pressure alarm will be turned on and
the E6 alarm icon will be displayed. Once the E6 alarm appears, it will continue to alarm for 8 minutes. After 8
minutes, if the pressure returns to normal, the high pressure alarm will be released;
(b) After the compressor is started for 3 minutes, it starts to detect a low pressure alarm. If a low pressure
alarm is detected for 10 seconds, it will activate the low pressure alarm and display the E5 alarm icon;
(c) Under normal operating conditions of the equipment, high voltage is normally closed, low voltage is
normally closed, and phase sequence is normally closed
6. High temperature protection:
When the indoor temperature is ≤ 41 ℃, the compressor operates normally; When the indoor temperature is
≥ 43 ℃: forcibly turn off the compressor, and after 3 minutes, turn off the fan and close the valve;
7. High humidity protection:
When the indoor (return air) humidity is above 75%, the valve is forced to close. When the indoor (return air)
humidity is again below 60%, the valve returns to normal operation.
Installation
1.Remove the iron
frame and screws from
the packaging box,
thread the wiring out
of the iron frame, and
then install and fix the
iron frame to the wall.
86 Install the box
2.Correct wiring
according to the
electrical wiring
diagram and wiring
markings
3.Align the lower
clamping point of
the product with the
iron frame and
buckle it, then press
and hold the upper
part of the product
to clamp it into the
iron frame
4.Confirm if the casing is
securely fastened and
installation is complete