FORM 160.54-O1
ISSUE DATE: 9/10/2014
JOHNSON CONTROLS
178
SECTION 3 - DISPLAY MESSAGES
Warning – Refrigerant Level Out Of Range
(Flash Memory Card version C.MLM.01.05C.xxx and
earlier and “P” compressors with C.MLM.04.01B and
earlier)
The output of the condenser refrigerant level sensor
is greater than 5.1VDC. This is indicative of a level
sensor failure. While this condition exists, the refriger-
ant variable orifice is driven to the full open position.
This message automatically clears when the refrigerant
level sensor output is within range.
Warning – Standby Lube – Low Oil Pressure
A minimum of 15 PSID of oil pressure was not achieved
in the first 30 seconds of a Standby Lubrication cycle,
or the pressure decreased below this value during the
remainder of the cycle. This message will be displayed
and no further Standby Lubrications will be performed
until the WARNING RESET key is pressed in Opera-
tor (or higher) access mode.
With software version C.OPT.01.23.307 (and later),
this warning is also set when either the Pump Oil Pres-
sure transducer or the Sump Oil Pressure transducer
is less than 2 PSIG when a Standby Lube is requested
by automatic control. This inhibits the Standby Lube
cycle when the chiller is open to atmosphere.
Warning – Setpoint Override
A blank BRAM battery-backed memory device (IC loca-
tion U52 on Microboard) or a failure of this device was
detected during the initialization process that occurs when
power is applied to the Control Center. Due to this fail-
ure, any or all of the programmed Setpoints could have
been corrupted. Therefore, all Setpoints have been auto-
matically changed to their Default values. All Setpoints
will have to be programmed to their desired values. This
message will clear when the WARNING RESET key is
pressed in Operator (or higher) access mode.
Warning – Condenser – High Pressure Limit
The Condenser Pressure exceeds the High Pressure Warn-
ing Setpoint threshold, programmed by a Service Tech-
nician logged in at SERVICE access level. 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 condenser
pressure decreases to 5 PSIG below the Setpoint.
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)
RESET
THRESHOLD (PSIG)
WATER BRINE WATER BRINE
R22 56.2
+1.9 more
than Safety
Setpoint
57.5
+3.2 more
than Safety
Setpoint
R134a 27.0 +2.0 >Safety
Setpoint
28.0 +3.0>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.
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