Daikin VRV Inverter K Series Manual page 350

Part9.fm Page 336 Wednesday, January 31, 2001 9:10 AM
Pump Down Operation when Replacing The Compressor
2. Pump Down Operation when Replacing The Compressor
2.1 Pump Down Operation when Replacing The Compressor
Pump down operation is when refrigerant is removed from an outdoor unit if it malfunctions. In this
case, outdoor units operate in the cooling mode and indoor units are automatically turned on by
thermostat.
2.1.1 Method
1. Fully shut stop valves of the liquid and pressure equalizing pipes of the unit from which you
2. Set to pump down mode in setting mode 2 and execute pump down operation.
3. After about 50 minutes, shut the stop valve of the gas pipe. (Outdoor units stop for
4. Operation is complete if after 10 minutes elapse the pressure of the pumped down outdoor unit
5. Purge the remaining pressure and perform servicing.
6. After sealing and vacuum drying, fill with gas until ambient temperature equivalent saturation
7. Shut the stop valve.
Note: Perform the procedure when outdoor temperature is in the range of 10˚C ~ 35 ˚C.
336
want to pump down refrigerant.
(Pressure equalizing pipe open for simultaneous cool/heat type)
(See the following page for details.)
For the simultaneous cool/heat type, it takes 3~10 minutes for the compressor to start
operating.
LED 23~26 are for monitoring low pressure during operation.
Outdoor units stop for approximately 1 hour.
approximately 1 hour.)
is ambient temperature equivalent saturation pressure or lower. If not, repeat steps 1~4.
pressure is reached.
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Special Service Mode PLUS Series
SiE-05C