Daikin EWYD-BZ - 5.26 Start-up sequence; 5.26.1 Unit start-up and shut-down flowcharts

D-EOMCP00104-14_01EN
Operating Manual
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EWYD_BZ
5.26 Start-up sequence
5.26.1 Unit start-up and shut-down flowcharts
Unit Start
Evap pump start
Evap flow switch
consensus within timer
expiration
Temperature control
start
No
Unit Trip
Yes
Temperature control
stabilitation
Compressors start
enabled
Control requires unit
loading
Control requires unit
standby
Control requires unit
unloading
New Compressor start
required
(see loading table)
Yes
No
New Compressors
selection
Compressors loading
Compressors standby
Compressor line
contactor closing
Transition confirmation
within 10 sec
Compressor complete
unloading
Yes
No
Compressor Trip
Prepurge procedure
Pressure ratio exceeds
minimum load limit
Yes
No
Compressor Trip
Compressor enabled to
load
No
Alarm delay timer
expired
Yes
Compressor stop
required
(see unloading table)
Yes
No
Compressors unloading
Compressor complete
unloading
Pumpdown procedure
Compressor line
contactor opening