37MGHAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Operating Conditions
When your air conditioner is used outside of the following temperature
ranges, certain safety protection features may activate and cause the unit
to disable.
Table 18 — Operating Temperature
FOR OUTDOOR UNITS OPERATING IN COLD AMBIENT
CONDITIONS
When outside temperature is below 32°F (0°C), we strongly
recommend keeping the unit powered on at all time to ensure
smooth ongoing performance.
NOTE: Room relative humidity less than 80%. If the air conditioner
operates in excess of this figure, the surface of the air
conditioner may attract condensation. Please sets the
vertical air flow louver to its maximum angle (vertically to
the floor), and set HIGH fan mode.
To further optimize the performance of your unit, do the following:
• Keep doors and windows closed.
• Limit energy usage by using TIMER ON and TIMER OFF functions.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.
MANUAL OPERATIONS AND MAINTENANCE
Operation mode selection
While two or more indoor units are simultaneously operating, make sure
the modes do not conflict with each other. The heat mode claims prece-
dence over all other modes. If the unit initially started to operate in HEAT
mode, the other units can operate in HEAT mode only. For example: If the
unit initially started operates under COOL (or FAN) mode, the other units
can operate under any mode except HEAT. If one of the unit selects
HEAT mode, the other operating units will stop operation and display ”--”
(for units with display window only) or the auto and operation indication
light will flash rapidly, the defrost indication light will turn on, and the
timer indication light will remain on (for units without a display window).
Alternatively, the defrost and alarm indication light (if applicable) will
light up, or the operation indication light will flash rapidly, and the timer
indication light will turn off (for the floor and standing type).
Maintenance
If you plan to leave the unit idle for a long time, perform the follow-
ing tasks:
1. Clean the indoor unit and air filter.
2. Select FAN ONLY mode and let the indoor fan run for a time to dry the
inside of the unit.
3. Disconnect the power supply and remove the battery from the remote
control.
4. Check components of the outdoor unit periodically. Contact a local
dealer or a customer service center if the unit requires servicing.
NOTE: Before you clean the air conditioner, be sure to switch off the
unit and disconnect the power supply plug.
Optimal operation
To achieve optimal performance, please note the following:
• Adjust the direction of the air flow so that it is not blowing directly on
people.
• Adjust the temperature to achieve the highest possible level of com-
fort. Do not adjust the unit to excessive temperature levels.
• Close doors and windows in COOL mode or HEAT mode.
• Use the TIMER ON button on the remote controller to select a time
you want to start your air conditioner.
• Do not place any object near the air inlet or air outlet, as the efficiency
of the air conditioner may be reduced and the air conditioner may stop
running.
• Clean the air filter periodically, otherwise cooling or heating perfor-
mance may be reduced.
• Do not operate unit with horizontal louver in closed position.
Suggestion:
For temperatures below 32F (0C), it is recommended to keep
power applied to outdoor unit for the crankcase heater to
assist in cold starting operation.
When the air conditioner is to be used again:
• Use a dry cloth to wipe off the dust accumulated on the rear air intake
grille in order to avoid the dust being dispersed from the indoor unit.
• Check that the wiring is not broken off or disconnected.
• Check that the air filter is installed.
• Check if the air outlet or inlet is blocked after the air conditioner has
not been used for a long time.
COOL MODE HEAT MODE DRY MODE
ROOM TEMP. 60°F~90°F (16°C~32°C) 32°F~86°F (0°C~30°C) 50°F~90°F (10°C~32°C)
OUTDOOR TEMP.
-22°F~122°F (-30°C~50°C)
For Hyper Heat models
-22°F~75°F (-30°C~24°C)
For Hyper Heat models
32°F~122°F (0°C~50°C)
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