Panasonic CW-C71YE / CW-C91YE Service Manual ▷ View online
Trouble
Check
Result
Cause
Remedy
Fan Motor won’t run
(Compressor run).
(Compressor run).
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Objects around
Fan.
Fan.
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RESISTANCE
between Wires.
between Wires.
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Capacitor Fan
Motor.
Motor.
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Main Control
Switch.
Switch.
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Locked Fan.
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Shorted / Open
circuit.
circuit.
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OHM Meter doesn’t
Deflect.
Deflect.
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No contacts at
Position Shown.
Position Shown.
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Fan Hitting Cowling or
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Foreign Materials.
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Frozen Bearings.
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Shorted or Burned out.
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Capacitor Defect.
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Main Control Switch defect.
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Adjust Fan position setting
screw.
screw.
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Remove Foreign Materials.
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Replace Fan Motor.
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Replace Fan Motor.
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Replace Capacitor Fan.
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Replace Main Control
Switch.
Switch.
Compressor won’t run (Fan
run).
run).
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Thermostat setting.
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RESISTANCE
between Terminal
and the
Compressor Body.
between Terminal
and the
Compressor Body.
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RESISTANCE
between Terminals.
between Terminals.
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Overload Protector.
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Capacitor
Compressor.
Compressor.
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Thermostat.
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Main Control
Switch.
Switch.
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Higher than room
temp.
temp.
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Shorted.
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Shorted.
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Infinity between
Terminals.
Terminals.
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OHM Meter doesn’t
deflect.
deflect.
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No click heard.
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No contacts at
Position Shown.
Position Shown.
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Winding Coil touched to
the compressor shell.
the compressor shell.
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Rear Shorted or Burnt out.
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Overload Protector defect.
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Capacitor defect.
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Thermostat defect.
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Main Control Switch defect.
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Set it lower.
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Replace Compressor.
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Replace Compressor.
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Replace Overload
Protector.
Protector.
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Replace Capacitor
Compressor.
Compressor.
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Replace Thermostat.
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Replace Main Control
Switch.
Switch.
Air Swing won’t run.
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Main Control
Switch.
Switch.
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Air Swing Switch.
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Resistance
between wires.
between wires.
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High or Low Fan
setting.
setting.
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OFF position.
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No contact at
position.
position.
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OHM Meter doesn’t
deflect.
deflect.
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Open circuit.
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Shorted or open circuit.
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Set it High or Low Cool.
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Set it ON.
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Replace Air Swing Switch.
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Replace Air Swing Motor.
Insufficient cooling.
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Thermostat Setting.
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Ventilation door
open.
open.
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Air filter dirty.
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Location of
installation.
installation.
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Evaporator /
Condenser Coil
obstructed.
Condenser Coil
obstructed.
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Unit capacity for
the room too small.
the room too small.
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Temp difference
and running
current.
and running
current.
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Higher than room
temp.
temp.
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Open.
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Clogged or dirty.
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Sunlight hitting
outdoor side.
outdoor side.
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Obstacles.
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Clogged or dirty.
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Not satisfied.
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REFER TO
PERFORMANCE
EVALUATION.
PERFORMANCE
EVALUATION.
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Reduces capacity.
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Restricted air circulation.
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Restricted Heat Exchanger.
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Restricted Heat Exchanger.
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Restricted air circulation.
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Leakage of refrigerant or
refrigeration system is
blocked.
refrigeration system is
blocked.
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Set it lower.
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Close Vent. door.
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Clean or replace Air Filter.
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Consider building an
AWNING.
AWNING.
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Remove obstacles or
reinstall unit.
reinstall unit.
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Clean the coils.
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Replace the unit with
bigger one.
bigger one.
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Locate repair leak.
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Flush refrigeration cycle.
Noise.
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Source of Noise
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Vibration.
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Intermittent Noise.
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Faulty installation.
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Fan hitting objects.
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Refrigerant tubing touching
each other.
each other.
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Fan splashing Drain Water.
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Reinstall unit or Reinforce
the installation.
the installation.
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Adjust Fan position or
remove foreign materials.
remove foreign materials.
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About 1/2” Clearance
needed.
needed.
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Normal occurrence.
Water dripping inside room.
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Unit installation.
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Drain Tray-
Styrofoam pieces
blocking drain
channel.
Styrofoam pieces
blocking drain
channel.
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Tilted to inside room.
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Clogged.
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Restricted run off.
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Clogged or blocked.
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Tilt unit to outside slightly.
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Remove the foreign
materials.
materials.
Frozen Evaporator
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Thermostat setting.
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Air filter /
Evaporator.
Evaporator.
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Temp. difference
and running
current.
and running
current.
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Set too low for
ambient conditions.
ambient conditions.
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Clogged or Dirty.
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REFER TO
PERFORMANCE
EVALUATION.
PERFORMANCE
EVALUATION.
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Outdoor temp. low (Night
time).
time).
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Restricted air circulation.
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Leakage of refrigerant or
refrigeration system is
blocked.
refrigeration system is
blocked.
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Set the Main Control Knob
to Fan to melt ice and set
the Temp. Control to
higher temperature.
to Fan to melt ice and set
the Temp. Control to
higher temperature.
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Clean Air filter /
Evaporator.
Evaporator.
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Locate and repair leak.
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Flush refrigeration cycle.
5
CW-C71YE / CW-C91YE
7.1. Parts Identification.
7.1.1. Vertical Airflow Direction Vane.
Airflow direction adjustment Up-and-Down.
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The vertical airflow direction vane may
be positioned to deflect the air upward,
downward or straight on.
be positioned to deflect the air upward,
downward or straight on.
7.1.2. Ventilation Lever.
When the slide lever is in the:
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“OPEN” position, the ventilation door
opens to allow air, smoke and odors to
be expelled from the room.
opens to allow air, smoke and odors to
be expelled from the room.
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“CLOSE” position, the ventilation door is
closed and the air inside the room is
circulated and conditioned.
closed and the air inside the room is
circulated and conditioned.
7.1.3. Operating Conditions.
Use the air conditioner under the following conditions:
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Operating temperature range.
Indoor side Indoor side Outdoor side Outdoor side
D.B.T.
W.B.T.
D.B.T.
W.B.T.
Maximum
Temperature
Temperature
32°C
23°C
43°C
26°C
Minimum
Temperature
Temperature
21°C
15°C
21°C
15°C
D.B.T.: Dry Bulb Temperature
W.B.T.: Wet Bulb Temperature
Note: Humidity may exceed 90%.
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Continuous operation at over 90% high humidity may
create condensation and result in water drops on the
intake and outlet vanes.
create condensation and result in water drops on the
intake and outlet vanes.
7 Operating Instructions
6
CW-C71YE / CW-C91YE
7.2. How to Operate.
(1) Open the Control Panel Cover.
Fig. 1
(2) Power Supply
Switch off the breaker and set the Main Control Knob to the
OFF position before plugging the power plug into an
electrical outlet.
OFF position before plugging the power plug into an
electrical outlet.
Fig. 2
(3) Main Control Knob
Set the Main Control Knob to either LOW COOL or HIGH
COOL as desired, FAN setting operates the fan only.
COOL as desired, FAN setting operates the fan only.
Caution: If the Main Control Knob is turned off or
changed to a fan setting from a cooling operation
setting, WAIT at least 3 minutes before resetting it to a
cooling operation.
changed to a fan setting from a cooling operation
setting, WAIT at least 3 minutes before resetting it to a
cooling operation.
Fig. 3
(4) Thermostat Control Knob
Turn the Thermostat Control Knob as shown in Fig. 4.
Usually “6” ~ “7” is the recommended setting position.
Usually “6” ~ “7” is the recommended setting position.
Note: When the Thermostat Control Knob is set to “10”,
moisture may freeze onto the evaporator fins and prevent
effective cooling. If this happens, turn the Main Control
Knob to HIGH FAN, and the Thermostat Control Knob
counterclockwise. This will quickly defrost the evaporator
fins so that normal cooling can be resumed.
moisture may freeze onto the evaporator fins and prevent
effective cooling. If this happens, turn the Main Control
Knob to HIGH FAN, and the Thermostat Control Knob
counterclockwise. This will quickly defrost the evaporator
fins so that normal cooling can be resumed.
Fig.4
(5) Air Swing Switch
(Airflow direction adjustment side-to-side)
To obtain a fixed airflow direction, set the Air Swing Switch
to “ON” for the vanes to swing from side to side until the
desired flow direction is reached, then switch it to “OFF”.
to “ON” for the vanes to swing from side to side until the
desired flow direction is reached, then switch it to “OFF”.
For continuous side-to-side air circulation, set the Air Swing
Switch to “ON”.
Switch to “ON”.
Fig. 5
7
CW-C71YE / CW-C91YE
8.1.1. Electrical Work.
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Always use at the rated voltage and with a specific air
conditioning circuit.
conditioning circuit.
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Power supply point shall be the place where there is ease
for the power disconnection in case of emergency.
for the power disconnection in case of emergency.
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Some installation locations may require installation of a
short-circuit breaker.
short-circuit breaker.
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A 16 Ampere time delay fuse or circuit breaker is required.
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Nominal cross sectional area of power supply wire must be
3 core x 1.0 mm2 or above.
3 core x 1.0 mm2 or above.
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The power supply must be from an independent circuit.
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All electrical installation must be made in accordance with
local wiring and safety regulations wherever applicable.
local wiring and safety regulations wherever applicable.
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There must be a double pole switch with minimum of 3mm
contact gap in the fixed installation circuit (Applicable for
models without power supply plug only).
contact gap in the fixed installation circuit (Applicable for
models without power supply plug only).
8.1.2. Select the Best Location.
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Install the unit at the nearest power outlet.
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The air conditioner should be installed in a dry place where
there are no draughts.
there are no draughts.
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Condensation from the air conditioner must be drained into
an appropriate location.
an appropriate location.
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Do not install in a location where flammable gas leaks is a
possibility.
possibility.
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Usage in locations where the air is salty such as coastal
areas or near hot spas, or where sulphurous gas is
generated, may lead to a malfunction.
areas or near hot spas, or where sulphurous gas is
generated, may lead to a malfunction.
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Do not install this appliance in a laundry room or other
locations where water may drip from the ceiling, etc.
locations where water may drip from the ceiling, etc.
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Select an installation location which is rigid and strong
enough to support or hold the unit and select a location for
easy maintenance.
enough to support or hold the unit and select a location for
easy maintenance.
8 How to Install
8.1. Before installing air conditioner, please read the following:
8.2. Preparation for Installation.
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There should not be any obstacles surrounding the unit.
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Prepare an installation hole that is only slightly bigger than the cabinet size.
8
CW-C71YE / CW-C91YE
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