Johnson Controls FRICK QUANTUM HD Maintenance Manual page 61

SYMPTOM
CONTROL PANEL DOES NOT
RESPOND TO REMOTE CONTROL
SIGNALS
MOTOR LOAD
CONTROL(FORCED UNLOAD)
OCCURS AT HIGH MOTOR AMPS
PRESSURES ON THE OPERAT-
ING SCREEN DO NOT APPEAR
CORRECT
COMPRESSOR WITH SLIDE
VALVE DOES NOT AUTOMATI-
CALLY LOAD OR UNLOAD*
COMPRESSOR THAT STEPS ON
CAPACITY DOES NOT AUTO-
MATICALLY LOAD OR UNLOAD*
COMPRESSOR AUXILIARY
SHUTDOWN
* If applicable
QUANTUM™ HD COMPRESSOR CONTROL PANEL
MAINTENANCE
PROBABLE CAUSES and CORRECTIONS
Digital I/O Board 2, Inputs 3 through 5 can be used to operate the compressor from a
remote location. NOTE: Check the Operating display to verify that the compressor and
the Slide Valve are in REMOTE I/O.
If the Input 3 (MOD 3) does not turn on, check if the LED (D3) is lit when it should be.
If it isn't, check the fuse (F3) and if the fuse is OK, check the input module (MOD 3).
If the Input 4 (MOD 4) does not turn on, check if the LED (D4) is lit when it should be.
If it isn't, check the fuse (F4) and if the fuse is OK, check the input module (MOD 4).
If the Input 5 (MOD 5) does not turn on, check if the LED (D5) is lit when it should be.
If it isn't, check the fuse (F5) and if the fuse is OK, check the input module (MOD 5).
The current transformer is used to convert the AC motor amps to a DC voltage signal
for the microprocessor. If the %FLA reading from the Operating display is incorrect,
contact the Frick © Service Department.
1st – Check the range and sensor type in the setup of the panel. If this is correct:
2nd – Open transducers that can be isolated from the system and opened to atmo-
sphere, these would be Suction, Oil and Filter (if present). Set these transducers to 0g
pressure or atmospheric pressure if your readings are in absolute. Close the transduc-
ers from atmosphere and reopen to the system/package. After these pressures have
settled down, set the Discharge to match the Oil pressure.
NOTE: Reference the Pressure Transducer Conversion Data Chart.
Verify that the Slide Valve Mode [AUTO] key has been pressed and AUTO appears under
Slide Valve Mode on the Level 1 Operating Status screen.
If the problem persists, see the Troubleshooting section SLIDE VALVE DOES NOT LOAD
and/or UNLOAD.
Verify that the Capacity Mode [AUTO] key has been pressed and AUTO appears under
Capacity Mode on the Level 1 Operating Status screen.
If the problem persists, see the Troubleshooting section COMPRESSOR DOES NOT
LOAD and/or UNLOAD.
Output 1 controls the Compressor Start Relay (By others). If the compressor does not
start and the LED (D1) for Output 1 (MOD 1) is on, check for the proper panel voltage
between position 4 and 1 on the P1 DIO connector on Digital I/O board #1. If the proper
voltage is not found, check the fuse (F1) and if the fuse is OK, check the output module
(MOD 1). If the voltage was OK, check for the proper voltage between position 1 on the
P1 DIO connector and position 18 on the terminal strip. If voltage is OK, check for the
proper voltage between position 18 and 2 on the terminal strip. If the voltage is OK,
check the interposing relay (By others).
The Compressor Starter Auxiliary Contacts turn on Input 2 (MOD 2) of Digital I/O Board
#1 when they are closed. These contacts are located on the Compressor Starter. If the
input does not turn on check if the LED (D2) is lit when it should be. If it isn't, check
the fuse (F2) and if the fuse is OK, check the input module (MOD 2). Check the voltage
between positions 2 and 4 of the P1 DIO connector.
090.040-M (MAR 12)
Page 61