Dritech HT-901 User manual

PRODUCT MANUAL
Portable Dehumidifier
HT-901

Product Manual
PORTABLE DEHUMIDIFIER HT-901

03
Dehumidiers extract moisture and lower the humidity in a room,
improving comfort for people and keeping the environment dry for
sensitive equipment and goods storage.
Mould and mildew growth can be controlled with the use of
dehumidiers.
Our dehumidiers are designed to be neat, compact, high quality and
easy to operate.
Introduction
Important Safety Instructions
Please read these instructions carefully before operation.
• Ensure that the power supply is 220 – 240 V / 50Hz.
• Place the unit in a position with unrestricted airflow.
• Do not cut off the power supply by pulling the power cable.
• Do not directly plug/unplug the power plug to start/stop the unit.
• Do not stick your fingers into the grille.
• Switch off and unplug the unit before cleaning or maintenance.
• Repairs on the unit should only be done by qualified professionals.

Product Manual
PORTABLE DEHUMIDIFIER HT-901
Schematic
1 Filter panel
2 Air outlet grille
3 Castor wheel
4 Water outlet pipeline
5 Air inlet grid panel
6 Digital control panel
Operation
HT - 901
HT - 901
Humidity Display Operation Indicator Defrost Indicator Memory Indicator
Memory Increase Humidity Decrease Humidity Power On / O

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Button Instructions
Shut Down
Start Up
1. ON / OFF : Switch the unit ON / OFF. The unit runs in this order: “ON – OFF – ON”.
2. Humidity Up / Down : Press once to increase / decrease humidity by 1% respectively.
Press and hold for 1.5 seconds to increase the rate of adjustment.
3. Memory: Activate / Deactivate the memory function. The Memory Indicator shows the
status of this function. This function stores the last user setting for the Humidity.
If the power is cut o while this function is active, the unit stores the Humidity setting,
and will automatically revert to this setting when power is restored.
Press “ON / OFF” while the unit is running. The unit will stop running and all indicators will
be switched o. Please note that any stored humidity setting for the memory function
will also be erased.
1. Plug in the power cable and turn on the power. A beep will sound if the unit is
working correctly.
2. Press “ON / OFF”. The Operation Indicator will turn on, and the Humidity Display window
will display the humidity setting. The default humidity setting is 60%. If the Memory
function is active, the humidity setting will restored to the saved user setting. 3 seconds
later, the humidity display window will display the current humidity reading.
3. Press the Humidity Up / Down key to adjust the level of humidity. If the humidity setting
is above/below the current reading with a threshold of 3%, the unit will activate/
deactivate accordingly.
4. The unit will go into continuous mode and the Humidity Display will show “CO” when
the user sets the humidity setting below 30%.

Product Manual
PORTABLE DEHUMIDIFIER HT-901
Notes
1. If the set humidity is higher than the current humidity, the unit will not run. To start the unit,
please lower the humidity setting to at least 3% lower than the current humidity reading.
2. When the tank is full, the Full Tank indicator will light up. The compressor and fan motor will be
shut o automatically, and the unit will alert the user by beeping twice. The two-beep alert will
continue once every 5 minutes until the tank is emptied and replaced.
3. Once the dehumidier starts operation, the fan motor and compressor will run for at least
3 minutes before any shut down. After shutting down, it will not restart operation for at least
another 3 minutes. This delayed start/stop feature protects the compressor and improves
its lifespan.
4. When operating in low temperatures, the unit will gauge the system temperature and
defrosts if necessary. When defrosting, the Defrost Indicator will light up. In this mode,
the fan motor will be running but the compressor will be switched o.
5. The range of the Humidity Display is 30% to 90%.
6. Unplug the unit if it is not used for extended periods. Drain the water and dry the unit
to prevent mould and mildew.

07
Maintenance and Safety
Do not overload the power adapters or extensions.
Do not put the unit near stoves or heaters.
Do not use outdoors, under strong
sunlight, wind or rain.
When there are unusual burning smells or noises,
switch o the power and unplug the unit. Seek
technical advice from Dritech or your vendor.
Do not use in an environment with volatile chemicals.
If you are not using the unit for an extended
period, please unplug the power.
When cleaning the unit,
switch o the power and unplug it.
In continuous draining mode, put in
the drainer well for smooth draining.
Risk of re and electric shock.
Resin may melt and re may occur.
The unit is only intended for indoor use.
Fire, electric shock or component
damage may occur.
Volatile chemicals may damage the
coils, resulting in gas leaks.
Risk of electric shock.
Risk of electric shock.
If the ambient temperature is near freezing
point, please do not use direct drainage.

Product Manual
PORTABLE DEHUMIDIFIER HT-901
Maintenance and Safety
Do not disassemble or repair on your own
unless you are trained and qualied.
Use rated power source of 220V – 240V.
To extend the lifespan of the lter.
Clean any dirt o the power plug and plug it in fully.
Place the dehumidier in a stable and at position.
Do not damage or twist power cables.
Do not use the unit near water sources.
Do not plug in the power plug
while the switch is on.
Risk of electric shock, and damage
to components.
If unit tilts or turns over, there will be water
spills or seepage, which may damage nearby
objects and result in re or electric shocks.
Risk of re and electric shock if incorrect
power source is used. Risk of re and electric shock.
Risk of re and electric shock.
Risk of re and electric shock.
Place the lter in a plastic bag when the unit
is not used for extended periods.
Risk of re and electric shock.

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Important Notes
1. When moving the unit, do not tilt it over 45° to avoid damaging the compressor.
2. The operating temperature is 5° - 32°C. Please ensure the room environment
meets this requirement.
3. When the unit is running, the room temperature may rise slightly due to heat generated
from the compressor and fan motor. This is perfectly normal.
4. At temperatures below 10°C and low absolute humidity, do not run the dehumidier
because it will not be able to extract much water.
5. Please keep the air inlet and outlet at least 6 inches away from walls or obstructions.
6. Seal the room to improve humidity control, otherwise the dehumidier will not be able to
extract moisture faster than fresh humidity coming into the room.
7. Clogged lters will lower the extraction capacity and may even result in malfunction. In
powdery and dusty environments, the lter should be cleaned more frequently to prevent
clogging. To clean the lter, remove it from behind the front panel.
Troubleshooting
Malfunction Cause Solution
Cannot be
switched on
1. No power
2. Unit is switched o
3. Unit not plugged in
4. Fuse blown
1. Restore power
2. Switch on the unit
3. Plug in and switch on
4. Send unit for troubleshooting to
determine source of overloading
Unit is ON but
not running
1. Water tank is FULL
2. Humidity reading is higher
than humidity setting
3. Sensor errors
1. Empty and replace the water tank
2. Lower the setting until it is at least 3%
lower than current reading
3. Refer to Error Codes section
No water
extracted
1. Filter clogged
2. Air inlet/outlet obstructed
3. Refrigerant leak
1. Clean the lter
2. Place unit where airow is unobstructed
3. Send unit for repair and recharge of gas
Water is extracted
but humidity is not
lowered
1. Fresh humidity from external source
2. Unit is undersized
1. Reduce sources of fresh humidity
2. Add more units or upsize the
dehumidiers
Abnormal noise 1. Unstable placement
2. Filter clogged
1. Place unit on level surface
2. Clean the lter

Product Manual
PORTABLE DEHUMIDIFIER HT-901
Additional Notes
1. If the issues cannot be rectied, please contact Dritech or your vendor for assistance.
2. Do not disassemble the unit unless your technicians are qualied.
3. When the unit starts or stops, some noise from the refrigerant pipeline is normal.
4. Warm air from the air outlet is normal.
Specications
If the system sensors detect an error, an error code will appear
in the humidity digital display window.
Error Codes
Error Code Faulty Component
E1 Humidity Sensor
E2 Defrost Sensor
Model
Humidity Removal ( 80% RH / 30° C )
Applying Space
Power Source
Rated Power Input
Rated Power Current
Refrigerant
Nett Weight
Gross Weight
Noise Level
Tank Size
Direct Drain Hose Diameter (Internal)
Airflow Rate
Dimensions (Width x Depth x Height)
HT-901
90 litres / day
100 - 120 m2(300 - 360 m3)
220 - 240V / 50 Hz / 1 phase
1320W
6.3A
R22
50 kg
55 kg
< 60 dB(A)
Continuous Drainage Only
¾” / 19mm
850 m3/h
480 x 420 x 960mm

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