Amcor DC-900 User manual

Dehumidifier
DC-900 DC-900H

PROBLEM POSSIBLE REASON TROUBLE SHOOTING
The unit doesn’t work
at all.
1. Bad connection of the main plug (Part
#211).
2. Humidistat (Part #208) breaks down.
3. Water tank (Part #102) not positioned well.
4. Micro switch (Part #207) springs off.
1. Replug.
2. Check and repair or replace.
3. Re-place the water tank.
4. Check, repair or replace.
Compressor works,
but the fan doesn’t.
1. Bad wires connection.
2. Speed switch (Part #209) breaks down.
3. Fan motor (Part #202) not work at all.
4. Fan blade (Part #122) is stuck.
1. Re-connect & fasten them
firmly.
2. Check, repair or replace.
3. Replace.
4. Check and adjust.
Compressor doesn’t
work, only fan to
circulate the air.
1. Bad wire connection.
2. Overload protector of compressor breaks
down.
3. Starting relay of compressor breaks down.
4. Humidistat (humidity controller) breaks
down.
5. Compressor breaks down.
6. The unit is on the mode of “Anti-Frost” .
7. Anti-frost p.c. board breaks down.
1. Re-connect & fasten them
firmly.
2. Check and repair or replace.
3. Check and repair or replace.
4. Check and repair or replace.
5. Check and repair or replace.
6. Normal condition.
7. Check and repair or replace.
Noise too loud 1. Fan blades scratch the surrounding parts.
2. Fan Motor makes loud noise.
3. Fan motor screws get loose.
4. Compressor screws get loose.
1. Check and position Fan
blade well.
2. Repair/replace Fan motor.
3. Re-fasten screws.
4. Re-fasten screws.
Frost (Ice) formed
on the surface of
Evaporator.
1. Insufficient refrigerant.
2. Anti-frost p.c. board is out of function
(below 16°C).
3. Dusty filer.
1. Find out and repair the
leakage, then recharge the
unit.
2. Check and repair or replace.
3. Clean the filter.
2

How to?
REPLACE THE COMPRESSOR
1. Take out the filter, remove the rear plate.
2. Take off the cover of overload protector, take
off the wire terminals and screws of the earth
wire.
3. Use soldering iron to take off the discharging
tube and suction tube from the compressor.
4. Unfasten the screws on the compressor.
5. Replace the compressor.
6. Re-assemble the unit in opposite process from
above
7. Vacuum the unit, then recharge the refrigerant.
* Please refer to the rating label at the rear of
the unit for correct refrigerant volume.
** Before soldering, need to clear out the
refrigerant completely.
REPLACE THE OVERLOAD PROTECTOR &
STARTING RELAY
1. Take off the cover of the overload protector
(Part #201A), take off the wire terminals.
2. Take out the starting relay and overload
protector.
3. Replacing with a new, fine one.
4. Re-assemble the unit in opposite process from
above.
REPLACE THE ANTI-FROST P.C. BOARD &
INDICATOR
1. Pull out the water tank, take off the filter, remove
the front & rear plates.
2. Take off all the wires terminals.
3. Replacing the defect anti-frost p.c. board &
indicator.
4. Re-assemble the unit in opposite process from
above
Notice! Do not insert the wire terminals in the
wrong position.
3

REPLACE THE MICRO SWITCH
1. Take out the filter, remove the rear plate.
2. Separate the relative wires surrounding the
micro switch and take off the micro switch
(part no. 211) from the middle spacer.
3. Replacing with a new one.
4. Re-assemble the unit in opposite process
from above.
REPLACE THE FAN MOTOR
1. Pull out the water tank, take off the filter, remove
the front & rear plates.
2. Take off the sensor fixer (part no. 117) & up
wind funnel.
3. Take out the fan motor from the motor fixer.
4. Replace the motor.
5. Re-assemble the unit in opposite process from
above.
REPLACE THE HUMIDISTAT & FAN SPEED
SWITCH
1. Pull out the water tank, take out the filter,
remove the front & rear plates.
2. Unfasten the wire terminals.
3. Take off the Electronic Cover (Part #110) and
loosen all relative screws.
4. Take off the defect humidistat or speed switch
from Front Grill (Part #103).
5. Replace with a new one.
6. Re-assemble the unit in opposite process from
above.
Notice ! Do not insert the wire terminals,
knob, switch in the wrong position.
4

CLEAN THE DUST ON THE EVAPORATOR &
CONDENSER
1. Pull out the water tank, take off the filter, remove
the front & rear plates.
2. Take off the up wind funnel & fan motor.
3. Use high pressure N2to blow off the dust on the
evaporator and condenser.
4. Use water to clean the evaporator and
condenser.
Notice ! Before you clean the evaporator and
condenser with water, make sure the motor has
been taken off. The electric part is not allowed to
touch with water.
CLEAN THE COOLING SYSTEM
1. Pull out the water tank, take off the filter,
remove the front & rear plates.
2. Using soldering iron to separate the capillary
tube from the dryer.
3. Connect a repair valve (with pressure gauge)
on the copper tube of the compressor.
4. Filling 0.8 ~ 1.0 Mpa N2into the inlet of the
fixing valve to clean the cooling system.
Notice ! Before soldering, you have to vacuum the
unit completely.
5

RELEASE THE REFIRGERANT
1 For the unit with recharging value, you can
discharge the refrigerant directly by the value.
2 For the unit without the value, please:
2.1 File the copper tube of the compressor.
* Do not file the copper tube off
completely, as long as there is an
opening is enough.
2.2 Use a tongs to clamp the copper tube,
the refrigerant will be released then.
Caution!
1. Whenever examine or replace the spare parts
of Cooling system, it is strictly necessary to
clean out the refrigerant
2. Never use air solder to solder the copper tube.
And to prevent from danger, please proceed the
releasing in a place with good ventilation and
away from fire.
3. If you need to repair or replace the parts of the
cooling system, please wait 10 minutes after the
refrigerant is released. Please use a soldering
iron to solder off the connection. *Please do not
use file to open the tubes, otherwise, the
system will be contaminated by small pieces of
metal.
4. As long as the tubes is opened, please use a
plastic film (such as plastic bag) to cover it
immediately. However, if you will not
re-assemble the parts in a short time, you
should use a plastic bag to cover its opening
instead, in order to keep it from contaminated
completely.
6

VACUUM & CHARGE THE REFRIGERANT
1. Take out the filter, remove the rear plate.
2. Connect the copper tube of compressor, quick
coupler, fixing value, vacuum pump and refrigerant
bottle. (Please refer to the drawing shown at right.)
3. Weigh the refrigerant amount by an electronic scale,
write down the amount.
4. Open the valve A& B of the fixing valve. Close the
valve of the refrigerant bottle, then open the vacuum
pump.
5. After 20 – 30 minutes, when the vacuum density is
higher than 133Pa, close the valve A of the fixing
valve, then close the vacuum pump.
6. Open the valve of refrigerant bottle first, then open
valve B of fixing valve slowly, the refrigerant will enter
the cooling system then.
7. When the charging amount is equal to the amount
mentioned in the rating label, close valve B of fixing
valve and valve of refrigerant bottle immediately.
8. Tong the charging tube between the compressor and
quick coupler completely. Notice! The charging tube
must be closed completely, otherwise, the refrigerant
will leak out.
9. Take off the quick coupler. Clamp the end of charging
tube flat
10. Soldering the end of the charging tube (which you
clamped it flat previously) to prevent it from leakage.
抽真空，充冷媒
HOW TO DETECT THE LEAKAGE OF REFRIGERANT?
1. Wipe the soap water of high density on the soldering
parts of the cooling system and the other parts which
are easy to have leakage.
2. The soap water will bubble when there is a leakage.
Notice! When the leakage is found, do not solder it
directly.
3. If no leakage is found by the soap water, it only
means there is no major leakage on the cooling
system. You may use a professional detector to
detect it again.
7

HOW TO ADJUST THE COOLING SYSTEM IS BLOCKED ?
1. Measure the temperature in front of & behind the dryer. If the temperature difference is too big, then it
means the dryer is blocked. Please change it.
2. Check the capillary is cool or not. If it is cool partially, it means, the capillary is blocked partially. If the
capillary is not cool at all, it means, the capillary is totally blocked.
HOW TO ADJUST THE REFRIGERANT IS TOO MUCH ?
1. Power consumption is much higher than the standard.
2. Working current is much higher than the standard.
3. Suction pressure is too high.
4. Thick ice forms on the evaporator.
5. Part of the condenser is hot.
6. Suction tube of the compressor is freezing.
Notice ! Above judgement should be made under the standard condition or similar condition.
HOW TO ADJUST THE REFRIGERANT IS INSUFFICENT OR HAS LEAKED ?
1. Power consumption is too low.
2. Working current is too small.
3. Suction pressure is too low.
4. Few ice or no ice on the evaporator.
5. Upper part of the condenser is warm, down part of the condenser is not warm.
6. Suction tube of the compressor is not cool.
Notice ! Above judgement should be made under the standard condition or similar condition.
HOW TO REPAIR THE DEFECT HEATER SET?
1. Take off the Rear Plate, loosen screws.
2. Take off defect Heater Set and replace new one.
3. Re-Assemble the unit in opposite process from
above. 电热组
Heating set
8