FORM 160.54-O1
49
JOHNSON CONTROLS
If equipped with software version C.OPT.01.18.307
or earlier, this is displayed as “Surge Detected”. It il-
luminates momentarily when a surge is detected by the
Surge Protection feature. If equipped with a VSD, it
illuminates whenever a surge is detected, regardless of
the VSD operating speed.
ACC Surge Detected (LED)
[Software version C.OPT.01.19.307 and later only.
Only displayed if equipped with a VSD (in MODBUS
protocol conguration only) or MV VSD]
Illuminates momentarily when a surge is detected by
the ACC function in the Microboard, while the drive is
running at less than maximum frequency.
Hot Gas Bypass Control Mode
Indicates whether the Hot Gas Bypass is under auto-
matic, manual or override control. When in manual con-
trol, it is controlled from this screen. When in override
control, “Minimum Load”, “VSD Override” or “VGD
override” is displayed as appropriate. Refer to Service
manual 160.54-M1 section 20 for details of these mes-
sages. Software versions C.OPT.01.18.307 and earlier
display “Override” for any of these conditions.
PROGRAMMABLE
Close Percentage
(5 to 15%)
This is the incremental amount that the Hot Gas valve
will be closed at 10 minute intervals after the HOLD
period has elapsed. Service Technicians refer to Service
manual 160.54-M1.
Hold Period
(30 to 120 minutes)
This is the period of time after no more surges are de-
tected that the Hot Gas valve closing will begin. Service
Technicians refer to Service manual 160.54-M1.
Minimum Load
(0 to 4ºF)
This sets the offset below the Leaving Chilled Liquid
Temperature Setpoint at which the Hot Gas valve will
be opened to the position allowed by the MAXIMUM
OPEN setpoint. Service Technicians refer to Service
manual 160.54-M1.
Maximum Open
(25 to 100%)
The maximum allowed position for the Hot Gas valve
during a Minimum load override condition. Service
Technicians refer to Service manual 160.54-M1.
[Hot Gas Bypass Control] Open (manual)
Puts the Hot Gas Bypass valve in manual control mode.
Each time this key is pressed, the valve position is in-
creased by 5%.
[Hot Gas Bypass Control] Close (manual)
Puts the Hot Gas Bypass valve in manual control mode.
Each this key is pressed, the valve position is decreased
by 5%.
[Hot Gas Bypass Control] Auto
Returns the Hot Gas Bypass Control to automatic
mode.
NAVIGATION
Home
Access Level Required: VIEW
Causes an instant return to the Home Screen
Compressor
Access Level Required: VIEW
Causes an instant return to the Compressor Screen
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