Si18-525B
Instruction
Operation Manual
197
2. Instruction
2.1
Outdoor Units
Note:
The instruction is for RMK(X)S series as representative.
REGARDING USE
Super Multi Plus System air conditioner
POINTS THE CUSTOMER SHOULD BE AWARE OF
COMFORT
At startup
After the power is initially turned on, it will take approx. 10 minutes until startup. Usually the unit will start
in 5 minutes.
At startup of heating operation
The colder it is outside or the greater the number of indoor units, the longer the time required from the
start of operation until the emission of warm air (around 35˚C). When the outside temperature is -5 to
2˚C, the inside temperature is 5 to 10˚C, and total indoor unit combination is 100% capacity, the first star-
tup of all indoor units in the morning will take approximately 20 to 30 minutes.
Oil return operation will be performed once every 8 hours to preserve the lubrication of oil to the com-
pressor.
Since operation is switched to cooling cycle during heating operation in order to return the oil, heating
operation will not be possible for around 5 to 10 minutes.
Heating operation
When the outside temperature is 28˚C or higher, the unit will be set to the standby mode for protection.
OPERATING NOISE
At startup
During startup, in order to emit warm or cool air as quickly as possible, the sound of refrigerant flowing
will be heard for a short time (1 to 2 minutes) from the outdoor unit.
At shutdown
In order to ensure smooth startup the next time this unit is operated, the outdoor unit will continue to oper-
ate for around 2 to 5 minutes after shutdown. (The time of continued operation depends on the outside
temperature, capacity of connected indoor units, and connection pipe length.)
Defrost
When the outside unit is performing defrosting operation, the fan of the indoor unit will stop temporarily,
and the slight sound of refrigerant flowing will be heard.
Cooling at low outside temperatures
During cooling operation when the outside temperature is 20˚C or less, the fan of the outdoor unit will
operate at low speed to preserve capacity and the outdoor unit valve will be opened depending on the
pressure conditions, making it more likely that the sound of refrigerant flowing will be heard.
Excessive heating load
During heating operation when the outside temperature is high (15 to 24˚C), the fan of the outdoor unit
will be operated at low speed, making it more likely that the sound of refrigerant flowing will be heard from
the outdoor unit.
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3PN00286-13U
Summary of Contents for D-Series
Page 1: ...Si18 525B Applied Models Super Multi Plus Cooling only Super Multi Plus Heat Pump D Series ...
Page 33: ...List of Functions Si18 525B 20 List of Functions ...
Page 71: ...Specifications Si18 525B 58 Specifications ...
Page 117: ...Refrigerant Flow for Each Operation Mode Si18 525B 104 Refrigerant Circuit ...
Page 171: ...Indoor Unit SkyAir Models Si18 525B 158 Function ...
Page 207: ...Test Operation and Field Setting for RA Indoor Unit Si18 525B 194 Test Operation ...
Page 336: ...Si18 525B Service Check Function Troubleshooting 323 ...
Page 469: ...Wiring Diagrams Si18 525B 456 Appendix ...
Page 475: ...Si18 525B vi Index ...
