York YK Style H Operation Manual page 168

SECTION 3 - DISPLAY MESSAGES
Warning – Evaporator – Low Pressure Limit
The Evaporator Pressure has decreased to the Warn-
ing threshold. This threshold is fixed in Water cooling
applications. In Brine cooling applications, the thresh-
old is a fixed amount above the programmable safety
shutdown threshold. The Safety threshold in Brine ap-
plications is determined by the Brine solution and is
determined by the YORK Factory. While this condition
is in effect, the Pre-rotation Vanes are inhibited from
further opening. This message automatically clears and
the Vanes are permitted to open when the Evaporator
Pressure increases to the reset value.
WARNING
THRESHOLD (PSIG)
WATER BRINE
+1.9 more
R22 56.2 than Safety
Setpoint
R134a 27.0 +2.0 >Safety
Setpoint
Warning – Vanes Uncalibrated – Fixed Speed
The Compressor Motor Variable Speed Drive (VSD) is
operating Fixed Speed (full speed) mode because the
Pre-rotation Vanes position potentiometer calibration
has not been performed.
Warning – Harmonic Filter – Operation Inhibited
The Compressor Motor Variable Speed Drive (VSD)
Harmonic Filter has been inhibited. Refer to Variable
Speed Drive – Service Instructions (Form 160.00-M1).
Harmonic Filter operation should not be altered by
anyone other than a qualified Service Technician.
Warning – Harmonic Filter – Data Loss
Communications between the Harmonic Filter Logic
Board and the Compressor Motor Variable Speed
Drive VSD Logic Board or the Adaptive Capacity
Control Board is not occurring. While this condition
exists, all filter related parameters are displayed as X's.
This message automatically clears when communica-
tions are restored.
Warning – Harmonic Filter – Input Frequency
Range
The power line frequency detected by the Compressor
Motor Variable Speed Drive (VSD) Harmonic Filter is
outside the range of 58 to 62Hz (60Hz), or 49 to 51Hz
(50Hz). While this condition exists, all filter related pa-
rameters are displayed as X's. This message automati-
cally clears when the line frequency is within range.
168
RESET
THRESHOLD (PSIG)
WATER BRINE
+3.2 more
57.5 than Safety
Setpoint
28.0 +3.0>Safety
Setpoint
Warning – Harmonic Filter – Not Running
This warning is set when all of the following are true
for 20 continuous seconds:
• Chiller is running
• Filter is enabled
• Filter present status is true
• Run Time greater than 20 seconds
• Filter operating mode is stopped
This warning is released when the chiller is stopped,
but will be displayed until manually cleared using the
WARNING RESET key when logged in at OPERA-
TOR (or higher) access level.
Warning – Vanes Uncalibrated
The Hot Gas Bypass feature is enabled, but the Pre-
rotation Vanes calibration procedure has not yet been
performed.
Warning – External I/O – Serial Communications
Serial communications between the Microboard and
the optional Analog I/O Board has been interrupted for
at least 20 seconds.
Warning – Excess Surge Detected
(Applies only if Surge Protection Shutdown feature is
Disabled)
The Surge Window Count has exceeded the Count
Limit. Message can be manually cleared after the
Surge Window Count is less than or equal to the Count
Limit, or the Shutdown feature is enabled or the chiller
is stopped. To clear message press WARNING RESET
key on HOME Screen when logged in at OPERATOR
(or higher) access level.
Warning – Liquid Level Setpoint not Achieved
Automatic reset warning message is displayed when
the Refrigerant Level is not within + or - 15% of the
Refrigerant Level Setpoint for 10 continuous minutes
after the chiller has been running for 30 minutes. It
will clear when within the 15% range or the chiller is
stopped.
Warning – Surge Protection – Excess Surge
Limit
(Applies only if Surge Protection Extended Run
feature is Enabled)
Displayed during the Surge Protection 10 minute Ex-
FORM 160.76-O2
issue date: 6/15/2015
JOHNsON CONtROLs