Owner`s manual

High Wall Type
Owner’s Manual
–5–
2. System Characteristics
Air conditioner operating conditions
For proper performance, operate the air conditioner under the following temperature conditions:
 Check before operation
• Turn on the power switch at least 12 hours before starting operation.
• Connect the ground wire securely.
• Attach the air filter to the indoor unit.
 Heating performance
• A heat pump system, which gathers outside heat and emits it into a room, is used for heating. When the
outside air temperature falls, the heating capacity of the unit is reduced.
• When the outside temperature is low, it is recommended that you also use other heating equipment.
 Defrosting during heating
• If frost falls on the outdoor unit during heating, defrosting is automatically performed (for approximately
2 - 10 minutes) to increase the heating effect.
• The fan of the indoor unit is stopped during defrosting.
 3-minute protection
The outdoor unit will not operate for approximately 3 minutes after the air conditioner has been immediately
restarted after stopping, or the power switch has been turned on. This is to protect the system.
 Auto restart
The unit will stop after a power failure.
• The unit will restart automatically in the same operating mode as before the power failure when the power
is restored.
 Fan rotation of a stopped indoor unit
• While other indoor units operate, the fans on indoor units in stand-by mode rotate for several minutes
approximately once per one hour to protect the machines.
 Protective device (High pressure switch)
The high pressure switch stops the air conditioner automatically when excessive load is applied to the air
conditioner.
If the protective device activates, the unit’s running stops and the operation lamp blinks.
The protective device may activate in the following cases:
Cooling operation
Outdoor temperature : 23 °F to 109.4 °F (-5 °C to 43 °C) *
Room temperature :
69.8 °F to 89.6 °F (21 °C to 32 °C) (Dry bulb temperature),
59 °F to 75.2 °F (15 °C to 24 °C) (Wet bulb temperature)
[CAUTION]
Room relative humidity – less than 80 %. If the air conditioner operates in excess
of this figure, condensation may occurs on the surface of the air conditioner.
Heating operation
Outdoor temperature : -5 °F to 59.9 °F (-15 °C to 15.5 °C) (Wet bulb temperature)
Room temperature : 59 °F to 82.4 °F (15 °C to 28 °C) (Dry bulb temperature)
If air conditioner is used outside of the above conditions, safety protection may work.
5-EN
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