HI-E DRY 195 Instrukcja instalacji, obsługi i serwisowania - Strona 6
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Drukuj stronęBlower does not run. Compressor runs briefly but cycles
on & off.
. Loose connection in blower circuit (Fig. 4).
2. Obstruction prevents impeller rotation.
3. Defective blower (Sec. 5.5).
Unit removes some water but not as much as expected.
. Air temperature and/or humidity have dropped.
2. Humidity meter and/or thermometer used are out of
calibration.
3. Unit has entered defrost cycle (Sec. 3.3 & 5.0).
4. Air filter dirty (Sec. 4.).
5. Defrost timer incorrectly set for conditions
(Sec. 3.3 & 5.0).
6. Defective defrost thermostat (Sec. 5.0).
7. Low refrigerant charge (Sec. 5.4).
8. Air leak such as loose cover.
9. Defective compressor (Sec. 5.6).
0. Restrictive ducting (Sec. 2.4).
Pump does not pump water.
. Hose kinked or plugged.
2. Pump check valve plugged (Sec. 5.).
3. Bad connection in pump circuit (Fig. 4).
4. Hose disconnected internally.
Evaporator coil frosted continuously, low dehumidifying
capacity.
. Defrost thermostat loose or defective
(Sec. 3.3 & 5.0).
2. Low refrigerant charge (Sec. 5.4).
3. Dirty air filters or airflow restricted. (Sec. 4.).
4. Defrost timer set incorrectly (Sec. 3.3).
5.4 Refrigerant Charging
If the refrigerant charge is lost due to service or a leak,
a new charge must be accurately weighed in. If any of
the old charge is left in the system, it must be removed
before weighing in the new charge. Refer to the unit
nameplate for the correct charge weight and refrigerant
type. Add the refrigerant through the low side service
port (See Fig. 5).
5.5 Blower Replacement
The centrifugal blower has a PSC motor and internal
thermal overload protection. If defective, the complete
assembly must be replaced.
. Unplug the power cord.
2. Remove the cabinet front (6 screws).
3. If an outlet duct is connected to the unit, remove it.
Toll-Free -800-
4. Disconnect the blower leads: white from the
compressor run capacitor, and black connected to
the fan switch.
5. Remove the nuts & bolts holding the blower outlet
flange to the cabinet end and remove the blower.
6. Reassembling with the new blower is the above
procedure reversed.
5.6 Compressor/Capacitor Replacement
This compressor is equipped with a two terminal external
overload, run capacitor, but no start capacitor or relay
(see Fig. 4).
CAUTION-ELECTRICAL SHOCK HAZARD: Electrical power
must be present to perform some tests; these tests
should be performed by a qualified service person.
5.6A Checking Compressor Motor Circuits
Perform the following tests if the blower runs but the
compressor does not with the humidity control ON.
. Turn the humidity control OFF and unplug the unit,
remove the cabinet front (6 screws).
2. Plug in the unit and turn the humidity control ON. Use
a voltmeter to check for 0 to 20 volts between
(a) the relay terminal that the black wire from the
compressor connects to and (b) the capacitor
terminal with the (2) white wires, () red wire & ()
brown wire connected. If voltage is present, go to
step 3. If no voltage, the low pressure control, the
defrost thermostat, the relay or the condensate
pump safety switch are open or there is a loose
connection in the compressor circuit. Test each
component for continuity; see the appropriate
section if a defect is suspected
3. Turn the humidity control OFF and unplug the unit,
then disconnect the red and yellow wires from
compressor terminals R & S. Using an ohmmeter
check continuity between the points listed below.
4. Compressor terminals C and S: No continuity
indicates an open start winding; the compressor
must be replaced.
5. Compressor terminals C and R: No continuity
indicates an open run winding; the compressor must
be replaced.
6. Compressor terminal C and overload terminal : No
continuity indicates a defective overload lead.
7. Overload terminals and 3: If there is no continuity,
the overload may be tripped; wait 0 minutes and try
again. If there is still no continuity, it is defective and
must be replaced.
8. Compressor terminal C and compressor case:
Continuity indicates a grounded motor; the
compressor must be replaced.
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