Hitachi YUTAKI Series - Control of Expansion Valve

149
Safety and control device setting
SMGB0066 rev.0 - 12/2009
Controller pack
Service Manual
4
Yes
Yes
Yes
No
No
No
1. Zero Reset Control
Expansion Valve 100 Pulse
2. Startup Control I
(operation with Fixed Opening)
5. Stop Control
3. Startup Control II
(TdSH Control Operation)
6. Zero Point Control
4. Normal Control
(TsSH Control Operation)
Fo > 0
F > 0
F = 0
7. Forced Opening Control to
Protect Product
 
Abasicowfortheexpansionvalvedriveassuminglongcompressoroperationtime.
Seesectionsfromthenextpagefordetailsineachprocedure(DetailsofPerformance,ShiftingConditions).
F: INV (Compressor)
Real Operation Frequency (Hz)
Fo: INV (Compressor)
Order Frequency (Hz)