SECTION 8 - MICROPANEL
JOHNSON CONTROLS
145
Form 201.28-NM1.1
Issue date: 08/06/2021
8
Precharge signal status and VSD cooling
status
VSD PRECHARGE SIGNAL = XXX
This display provides the state of the precharge signal,
where XXX is either ON or OFF at the time of the
fault.
Compressor #1 and #2, 105% FLA motor
overload current setting
VSD COMP 1 MOTOR OVERLOAD = XXX AMPS
COMP 2 MOTOR OVERLOAD = XXX AMPS
This message displays the setting of the VSD’s 100%
FLA potentiometer for Compressor #1 and #2 at the
time of the fault.
System data
System #1 pressures
SYS 1 PRESSURES OIL = XXXX PSIG
DISCHARGE = XXXX PSIG
This message displays the measured system oil and
discharge pressures at the time of the fault.
SYS 1 PRESSURES SUCTION = XXXX PSIG
CONDENSER LIQUID = XXXX PSIG
This message displays the measured system suction
and condenser liquid line pressure at the time of the
fault.
System # 1 temperatures
SYS 1 TEMPERATURES OIL = XXX.X °F
EDUCTOR = XXX.X °F
This message displays the measured system oil and
eductor temperatures at the time of the fault.
SYS 1 CONDENSER LIQUID TEMP = XXX.X °F
SUBCOOLING = XXX.X SAT TEMP = XXX.X °F
This message displays the condenser liquid, liquid line
subcooling and saturated discharge temperatures at the
time of the fault.
SYS 1 DISCHARGE TEMP = XXX.X °F
SUPERHEAT = XXX.X SAT TEMP = XXX.X °F
This message displays the system discharge, discharge
superheat and saturated discharge temperatures at the
time of the fault.
Compressor speed and heater status
SYS 1 COMPRESSOR SPEED = XXX.X %
HEATER = XXX.X °F
This message indicates the compressor speed in % and
the heater status at the time of the fault.
System #1 motor temperatures
SYS 1 MOTOR TEMPS T1 = XXX.X °F
T2 = XXX.X T3 = XXX.X °F
This message displays the System 1 motor thermistor
temperatures at the time of the fault.
Flash tank level and economizer position
SYS 1 FLASH TANK LEVEL Y 512 ADC
ECONOMIZER VALVE = XXX.X %
This message displays the flash tank level and the
economizer valve position in % at the time of the fault.
Condenser subcooling and condenser drain
valve position
SYS 1 CONDENSER SUBCOOLING = XXX.X °F
CONDENSER DRAIN VALVE = XXX.X %
This message displays the condenser subcooling and
the Condenser Drain Valve position at the time of the
fault.
Condenser fans
SYS 1 CONDENSER FANS ON = X
SYS 1 CONDENSER FANS ON = X
VSD FAN SPEED XX.X V = XXX %
This message displays the number of condenser fans
ON or the optional VSD fan control speed signal to the
inverter and the % of full speed.
VI step solenoid
SYS 1 VI STEP SOLENOID 1 = XXX
VI STEP SOLENOID 2 = XXX
This message displays whether the VI solenoids were
ON or OFF at the time of the fault.
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