QUANTUM
™
HD COMPRESSOR CONTROL PANEL
MAINTENANCE
090.040-M (NOV 2016)
Page 60
SYMPTOM PROBABLE CAUSES and CORRECTIONS
DISPLAY IS INOPERATIVE
Check for power at the panel. See if any of the LED’s on the Q5 Processor Board are
blinking or any lights are blinking on the other boards. If no lights are blinking, make sure
the control power switch is switched on. If there are still no lights, then check the circuit
breaker (2CB). If the breaker is not tripped, check for power into 2CB. If there is no power,
check the external power being supplied. If power from 2CB, check power supply for input
AC and output DC level.
Shut off power to the panel and rst conrm that the display connector is rmly seated.
Care needs to be taken when checking and reconnecting or reseatting this connection.
Conrm that the connectors at both ends of the backlight inverter are properly connected.
Conrm that the display harness is connected properly on the main board. Refer to Section
3 of this manual for more information.
Check the display with a ashlight. If characters are visible, the display is good, but the LED
backlight stick is not on and may need replaced.
OIL PUMP DOES NOT START
The LED (D3) for Output 3 (MOD 3) of Digital I/O Board #1 should be on when pump is called
on to run. If the pump does not start when the LED is on, check for the proper panel voltage
between position 4 and 5 on the P1 DIO connector on Digital I/O board #1. If the proper
voltage is not found, check the fuse (F3) and if the fuse is OK, check the output module
(MOD 3). If the voltage was OK, check for the proper voltage between position 5 on the P1
DIO connector and position 8 on the terminal strip. If voltage is OK, check for the proper
voltage between position 8 and 2 on the terminal strip. If the voltage is OK, check at the oil
pump starter. If all of this is OK, then check the Digital Status screen to see if channel 3 is ON.
The Oil Pump #1 Auxiliary Contact switches voltage to Input 4 (MOD 4) of Digital I/O Board
#1 when the auxiliary contacts are closed. If the input 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). Check the voltage between positions 4 and 6 of the P1 DIO connector. If
the LED is ON, check channel 4 on the DIO of Digital Board 1, at the Digital Status screen.
OIL PUMP IS RUNNING BUT THE
COMPRESSOR DOES NOT START
For compressor models with a slide valve: Verify that the Slide Valve has unloaded to or
below the Highest Slide Valve Position to allow starting the compressor setpoint. If the
slide valve has not unloaded, troubleshoot the hydraulic system. Compressor will not start
until the Slide Valve is unloaded. Output 1 (MOD 1) of Digital I/O Board #1 controls the
motor starter. If the motor does not start when the LED (D1) 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).
COMPRESSOR AUXILIARY
SHUTDOWN
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 con-
nector 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.
* If applicable
TROUBLESHOOTING CHART FOR FRICK
®
QUANTUM
™
HD CONTROL PANEL
(REFER TO WIRING DIAGRAMS)
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