Afd Mains Phase Loss - Trane Agility HDWA Installation, Operation And Maintenance Manual

AFD Mains Phase Loss

The following figure shows how the controls act in a
power interruption event that the Adaptive
Figure 41. Sequence of events: AFD mains phase loss
"AFD Mains Phase Loss" From Drive
(Controls Remain Powered)
Running
De-Energize
Compressor
No Evap Pump Off Delay
for Immediate Shutdown
De-Energize
Condenser Water Pump
Close Economizer EXV
Close Motor Cooling
Valve
(200 and 300 Ton Only)
Close Drive Cooling
Valve
Close IGV
HDWA-SVX001D-EN
Shutting Down
Close IGV (0 to 50 Seconds)
De-Energize Evaporator
Water Pump Relay
S S t t a a r r t t - - u u p p a a n n d d S S h h u u t t - - d d o o w w n n
Frequency™ Drive (AFD) diagnoses as a AFD Mains
Phase Loss (MPL) diagnostic.
"AFD Mains Phase Loss"
Cleared and Need to Cool
Waiting to Start
Establish Condenser and Evaporator
Water Flow (6 Second Filter)
Energize Evaporator
Water Pump Relay
Energize Condenser
Water Pump Relay
Evaporator
EXV Pre-position
Starting
Compressor
57