The outdoor unit EEPROM settings can be used for the following functions.
17-1. Outdoor Unit Noise Countermeasure: EEPROM 05 (set at each outdoor unit)
This unit includes 3 types of Quiet modes. (However, when they are engaged, operation is in Quiet mode 24 hours
a day.) Selecting a Quiet mode results in operation that gives priority to reducing noise. Because these modes
involve restrictions on outdoor unit fan modes and the operation frequency, the capacity will be somewhat reduced.
* If Quiet mode is set, the capacity will begin to decrease during heating operation at low outdoor temperatures,
when the outdoor air temperature is below standard conditions.
17-2. Anti-slime countermeasures ... EEPROM setting OC (set only on the main unit)
This setting controls the operation of the drain pump.
17-3. Delayed Start for Each System: Outdoor EEPROM 3E (set only on outdoor unit No. 1)
The operation start time can be delayed according to the set system addresses.
This setting reduces the voltage drop by preventing multiple systems from starting at the same time when opera-
tion is restarted after multiple operating systems were stopped due to a power outage or other cause.
17-4. Automatic Backup: Outdoor EEPROM 48 (set only on outdoor unit No. 1)
Automatic backup is set to occur at the time the unit is shipped from the factory. However, the automatic backup
function can be disabled by changing this setting to 1.
0Nodelayed start (se tting a t time of factory sh ipment)
1Startbegins after [1 second System address]
2Startbegins after [2 seconds System address]
3Startbegins after [3 seconds System address]
0Normalcontrol (setting at time of factory shipment)
1The drain pump operates for 20 minutes at 2-hour intervals.
2The drain pump operates for 20 m inutes at 20-minute intervals.
3The drain pump operates constantl y.
014
Normal operation (setting at time of
factory shipment)
0
112
Noise reduced by approx. 1 – 2 dB from
the catalog value.
Approx. 0.5 hp
211
Noise reduced by approx. 2 – 3 dB from
the catalog value.
Approx. 1.2 hp
310
Noise reduced by approx. 5 dB from the
catalog value.
Approx. 1.8 hp
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