DEVOODS MDH-180B User manual

Model MDH-180B
(Single Phase)
Industrial Dehumidifier
User Manual
*Please read this instruction manual carefully before you use your dehumidifier

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CONTENTS
•INTRODUCTION 3
•IMPORTANT SAFETY INSTRUCTIONS 4
•CONTROL/DISPLAY PANEL 5
•ILLUSTRATIVE DIAGRAM -PARTS 6
•OPERATING INSTRUCTIONS 7
•TECHNICAL SPECIFICATIONS 9
•SERVICE AND MAINTENANCE 10
•TROUBLESHOOTING 11

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INTRODUCTION
Please read this instruction manual carefully before you use this dehumidifier.
DEVOODS Industrial dehumidifiers are designed to work in the toughest conditions.
It is commonly used for larger spaces like factories and warehouses, to remove excess
moisture and generate the optimum level of relative humidity in the shortest period.
The MDH-180B removes water vapor from the air aggressively, which in turn elevates
the drying of materials by movement of air thereby inducing evaporation of moisture
from molecules to water vapor.
The MDH-180B is a floor standing industrial range of refrigerant dehumidifier
designed for installation and use where the distribution of air by peripheral air pattern
is required and preferred.
In warehouses or factories where machineries, products or high racking hinder the
effective airflow distribution of smaller dehumidifiers, the MDH-180B overcomes this
issue. When outside air permeates into the building due to non-tight construction design
of certain warehouses, the MDH-180B is powerful enough to remove the moisture more
efficiently and effectively than air conditioners and at a lower operation cost.
Relative Humidity is a measurement of how much moisture is in the air. It is the ratio
that indicates the ability of the air to absorb more moisture, expressed in percent
(%RH). For more information, see also specific/ absolute humidity.
The lower the percentage in RH, the lower the moisture contents in the air and the
greater the air's ability to absorb more moisture. When the air reaches 100% RH, it
reaches its saturation point and the water vapor turns to liquid, forming droplets of
condensation.
The DEVOODS range of Dehumidifiers is reputed in quality and reliability and is
proven with thousands of applications all over. Your DEVOODS dehumidifier comes
with two (2) years limited warranty against manufacturing defects.

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IMPORTANT SAFETY INSTRUCTIONS
1. When using electrical appliances always apply basic safety precautions to reduce
the risk of electrical shock, fire or injury to persons.
2. If the electrical supply cord or plug is damaged, it must be replaced by the
manufacturer, its service agent, or similar qualified persons.
3. Unit must be electrically grounded. Use only a 220-240 Volt 3-wire 1 phase supply
with neutral and earth.
4. Always switch off at the main power socket when not in use and before unplugging.
Always unplug the unit before cleaning and inspect connections for damages.
5. Do not use in the following locations or similar conditions:
5.1 Do not operate in standing water.
5.2 Do not operate in rain or areas where water is likely to splash motor.
5.3 Do not operate next to a source of heat.
5.4 Do not obstruct air Inlet or Outlet
6. Do not spray water on the dehumidifier. Keep all electrical components in dry
condition. If electrical components are wet, ensure unit is inspected by a qualified
electrician before operating.
7. Always store the unit upright to maintain the compressor in proper working
condition.
8. Remove filter and clean with vacuum cleaner or wash with mild detergent. Do NOT
wash with hot water or dish washer. Do NOT dry under direct sunlight.
9. The unit is fitted with an auto defrosting operation and starts when the evaporator
generates frost. The function ensures continuous running when the temperature is
between 5˚C and 38˚C. The moisture removal rate may vary depending on
temperature and moisture load in the air stream. Caution –operating under
condition below 10°C may result in constant frosting and less effective
dehumidification.

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CONTROL/DISPLAY PANEL
1. Press ON/OFF key to start and to shut down the dehumidifier.
2. Auto On and OFF can be set from 1-24 hours.
3. To change the fan speed between high fan and low fan.
4. Up and down key.
a. Press UP or DOWN key to set the desired humidity level from CO-30%-31%-
32%-----80%-CO.
b. To set the current time and target timer on/off.
c. Press and keys at the same time for 2s to lock and unlock control
panel.
5. Mode Selection: Press to select dehumidification mode, ventilation mode.
6. Humidity Reading: Real-time display of current ambient humidity.
7. Fan Speed Indicators: Display the fan speed.
8. Time Indicator: Real-time display of time.
9. Timer Indicators: Timer ON or OFF
10. Temperature Indicator: Real -time display of current ambient temperature.
11. Lock Indicator: Lighted during lock mode.
12. Defrost Indicator: Lighted during defrost mode.
13. Dehumidification Indicator: Lighted in dehumidification mode.
14. Ventilation Indicator: Lighted in ventilation mode.

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ILLUSTRATIVE DIAGRAMS - PARTS
Control Panel
Air Outlet
Remote Interlock & RS- 485
Terminal
Drainage outlet
(Inside diameter 14mm)
(Outside diameter 16mm)
Caster

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OPERATING INSTRUCTIONS
Setting Up and Installation
1. While every unit of DEVOODS Dehumidifier has been tested in factory and PDI
by AAQ before delivery, transportation and handling may result in various levels
of damages. It is imperative that installer/ Owner inspect the packaging and unit
body prior to installation. Report all damages if goods is received not in its original
condition.
2. The dehumidifier should be installed with consideration for service and
maintenance. Sufficient space should be allowed for servicemen/ technicians to
access with safety considerations.
3. The dehumidifier should not be installed in an area where the temperature is lower
than the process air’s dew point to prevent condensation.
4. Condensate drain pipe should be carefully fitted to prevent leakages.
5. Check to ensure there is no debris or any loose components inside the compartment
that may damage the fan motor.
DEVOODS MDH series uses an external power supply of 220-240V/1PH/50Hz.
Connect the five wires (neutral and ground) with three wires labelled “U”, “V”, “W”,
and the wire mark of “ ” to the ground. (the unit should have a circuit breaker of 20A
to achieve an independent control).
1. Fan Speed
Press fan speed “ ” key to change the fan speed between high fan and low
fan.
2. Humidity Setting
Press the up “ ” down “ ” key to select your preferred humidity from
20% to 95%.
3. Ventilation mode
Press the mode “ ” key once to select ventilation mode, unit runs with high
fan speed without dehumidifying.

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4. Manual Mode
Press the mode “ ” key 2 times to select Manual mode.
5. Clock Setting
Press “ ” key and “ “ for 5s to access clock setting mode.
The hour segment will blink. Use the “ “ & “ “ to set the required hour.
While hour segment is blinking, press “ ” key and “ “ for 5s and change
to the minutes segment. In the minutes segment, while the display is blinking,
use the “ “ & “ “ to set the required minutes.
6. Timer Setting
Press “ ” key for 5s, the “ ” timer indicator will light on, and then press
the “ ” key twice to switch on timer setting, the original value is 00, press up
or down key to set 01, the unit will run for 23 hours and 45 minutes, and shut
down within 15 minutes for a cycle to run normally. Auto timer setting will be
cancelled if the value setting on 00.
7. Automatic Defrost
When the unit has operated for a while at a low temperature, moisture in the air
would condense on the evaporator coil, automatic defrosting will be ON. During
defrost mode, compressor stops running, the fan motor runs at high fan, and
defrost “ ” indicator lights up.
8. Compressor Delay Protection
To ensure the appliance operate normally for a long time in a safe condition,
3 minutes delay protection function is designed to ensure that the time
between operating and stopping the compressor is not less than 3 minutes.

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TECHNICAL SPECIFICATIONS
Model No
DEVOODS MDH-180B
Power Supply (5-wire)
220-240/ 1Ph/ 50Hz
Capacity (30*C, 80%RH)
180L/day
Power Consumption
3400W
Compressor type
Rotary type
Refrigerant
R410A
Operating Temp.
5°C –35°C
Filter efficiency
G4
Sound level
63dBA
Net Weight
110kg
Dimension (WxDxH)
780mm x 465mm x 1775mm

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SERVICE AND MAINTENANCE
Error Code Display
Memory Function
When switched on or the power is reset, the unit can automatically recover to its
previous status.
Note: After power failure, the working mode, target humidity, fan speed, timer setting,
and lock key setting all keep its previous status.
Lock Key Function
Lock key program is designed for this unit, press “ ” and “ ” at the same time for
2s, lock key “ ” indicator lights, all keys on panel will be locked. To release the lock,
you just need to repeat the previous operation again.
Contact AAQ Service Department at 603 –9202 7295 or [email protected].my for
technical assistance.

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TROUBLESHOOTING
Before contacting the manufacturer or agent for service, please check for the
following conditions:
Situations
Reason
Corrective Action
Unit does not
operate
No power supply
display off
•No power supply
•Recover power supply
•The fuse of the control
panel is burned out.
•Change new fuse
Power supply
display off
•Ambient humidity is
lower than target
humidity.
•Set the humidity again
•Checked neutral wire
•Add neutral wire
E3
Motor is
abnormally
Capacitor is damaged
Change Capacitor
Shaft is stuck
Change motor
Inside loop is damaged
Change motor
Compressor is
abnormally
working
Capacitor of compressor
is damaged
Change Capacitor
Piston is stuck
Change compressor
Inside loop is damaged
Change compressor
Lack of refrigerant
Check the point of leakage,
recover it. Create a vacuum
again, add refrigerant.
FF
Communication failure between control panel
and main board
Connection wire between
display and main board is
loose or disconnected.
F5
High temperature
protection
Ambient temperature
exceeds 40°c
/
Low temperature
protection
Ambient temperature is
lower than 2°c
/