Carrier 37MUHAQ60AA3 - Operation Instructions

45MUAAQ: Owner’s Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
15
OPERATION INSTRUCTIONS
NOTES:
• Different models have different front panel and display window.
Not all the indicators describing below are available for the air
conditioner you purchased. Check the indoor display window of
the unit you purchased.
• Illustrations in this manual are for explanatory purposes. The
actual shape of your indoor unit may be slightly different. See Fig.
15. The actual shape shall prevail.
• This display panel on the indoor unit can be used to operate the
unit in case the remote control has been misplaced or is out of
batteries. See Fig. 19.
Fig. 15 —Indoor Unit Representation
• FORCED COOL mode: In FORCED COOL mode, the Operation
light flashes. The system will then turn to AUTO after it has cooled
with a high wind speed for 30 minutes. The remote control will be
disabled during this operation.
• OFF mode: When the controller is turned off, the unit turns off
and will not come back on until the controller is turned back on
BUILT-IN 24V INTERFACE STANDARD
Allows the control of the air handler with a third party thermostat (field
supplied).
Other Features
Default Setting
When the unit restarts after a power failure, it will default to the factory
settings (AUTO mode, AUTO fan, 76°F (24°C)). This may cause
inconsistencies on the remote control and unit panel. Use your remote
control to update the status.
Auto-Restart
In case of power failure, the system will immediately stop. When power
returns, the Operation light on the indoor unit flashes. To restart the unit,
press ON/OFF on the remote control. If the system has an auto restart
function, the unit will restart using the same settings.
Three-Minute Protection Feature
A protection feature prevents the unit from being activated for
approximately 3 minutes when it restarts immediately after operation.
Heat Exchanger Dust Removal Function
This feature helps keep the outdoor coil cleaner and may extend the duration
between regular maintenance intervals depending on local conditions. When the
unit is turned off, a 10 seconds delay occurs and the outdoor fan runs in reverse
rotation for 70 seconds to blow off loose accumulated dust and debris.
Sleep Operation
The SLEEP function is used to decrease energy use while you sleep (and
you do not need the same temperature settings to stay comfortable). This
function can only be activated via remote control. And the Sleep function
is not available in FAN or DRY mode.
Press SLEEP when you are ready to go to sleep. When in COOL mode,
the unit will increase the temperature by 2°F (1°C) after 1 hour, and will
increase an additional 2°F (1°C) after another hour.
When in HEAT mode, the unit will decrease the temperature by 2°F (1°C)
after 1 hour, and will decrease an additional 2°F (1°C) after another hour.
The sleep feature will stop after 8 hours and the system will keep running with
final situation.
Fig. 16 —Sleep Operation
Refrigerant Leakage Detection
• When the system detects a malfunction of the refrigerant, the
indoor unit will automatically display the following error codes:
“EL0C (System lacks refrigerant)” ,
“EHC1 (Refrigerant sensor detects leakage)”,
“EHC2 (Working condition of the refrigerant sensor is out of
range and leakage is detected)”, “EHC3 (Working condition of the
refrigerant sensor is out of range)”, or
“ECC1 (Other indoor unit refrigerant sensor detects leakage
(Multi-zone)”.
• When “EHC1” or “EHC2” error occurs, the buzzer will continue
to beep for 5 to 6 minutes before stopping. You can also press any
button on the remote controller to stop the buzzer.
Air outlet
Air inlet
Drain hose
Refrigerant
connecting
pipe
Blower
Coil
Filter
Coil Compartment
(Access Panel Removed)
Horizontal Drain Pan
Set
temperature
Cool mode(+1 C/2 F) per hour
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1hr
1hr
Keep
running
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Heat mode( -1 C/2 F) per hour
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