Frick QUANTUM Maintenance Manual page 17

SYMPTOM
SLIDE STOP DOES NOT INCREASE
and/or DECREASE* Some Compressor
Models:
Slide Stop Increase = Decrease to 3.5Vi
Slide Stop Decrease = Decrease to 2.2Vi
LIQUID INJECTION SOLENOID DOES
NOT ENERGIZE* (Liquid
Refrigerant Cutout - LICO)
HI Vi LIQUID INJECTION
SOLENOID DOES NOT ENERGIZE*
ECONOMIZER*
ALARM CIRCUIT DOES NOT ENERGIZE
FRICK QUANTUM COMPRESSOR CONTROL PANEL
MAINTENANCE
PROBABLE CAUSES and CORRECTIONS
Verify that the Slide Stop is in the AUTO mode and that the VI Ratio is calling
for a VI increase or decrease.
Output 7 (MOD 7) controls Slide Stop Increase Solenoid. If the LED (D7) for
Output 7 (MOD 7) is on, check for the proper panel voltage between position 4
and 5 on the P2 DIO connector on Digital I/O board #1. If the proper voltage is
not found, check the fuse (F7) and if the fuse is OK, check the output module
(MOD 7). If the voltage was OK, check for the proper voltage between position
5 on the P2 DIO connector and position 15 on the terminal strip. If voltage is
OK, check for the proper voltage between position 15 and 2 on the terminal
strip. If the voltage is OK, check the solenoid valve.
Output 8 (MOD 8) controls the Slide Stop Decrease Solenoid. If the LED (D8)
for Output 8 (MOD 8) is on, check for the proper panel voltage between
position 4 and 6 on the P2 DIO connector on Digital I/O board #1. If the proper
voltage is not found, check the fuse (F8) and if the fuse is OK, check the
output module (MOD 8). If the voltage was OK check for the proper voltage
between position 6 on the P2 DIO connector and position 14 on the terminal
strip. If voltage is OK, check for the proper voltage between position 14 and 2
on the terminal strip. If the voltage is OK, check the solenoid valve.
Verify that the Liquid Injection TXV is modulating properly and not feeding
Injection excessive liquid to LICO the compressor. This solenoid SHOULD be de-
energized when the compressor is off. This solenoid should be energized if the
oil temperature equals or exceeds the "Oil Temperature On At" setpoint for the
delay time.
Output 9 controls the Liquid Injection Solenoid. If the LED (D9) for Output 9
(MOD 9) is on, check for the proper panel voltage between position 4 and 1 on
the P3 DIO connector on Digital I/O board #1. If the proper voltage is not
found, check the fuse (F9) and if the fuse is OK, check the output module
(MOD 9). If the voltage was OK, check for the proper voltage between position
1 on the P3 DIO connector and position 13 on the terminal strip. If voltage is
OK, check for the proper voltage between position 13 and 2 on the terminal
strip. If the voltage is OK, check the solenoid.
PORT Output 10 controls the Hi Vi Liquid Injection Port solenoid. If the LED (D10) for
Output 10 (MOD 10) is on, check for the proper panel voltage between
position 4 and 2 on the P3 DIO connector on Digital I/O board #1. If the proper
voltage is not found, check the fuse (F10) and if the fuse is OK, check the
output module (MOD 10). If the voltage was OK check for the proper voltage
between position 2 on the P3 DIO connector and position 12 on the terminal
strip. If voltage is OK, check for the proper voltage between position 12 and 2
on the terminal strip. If the voltage is OK, check the solenoid. NOTE: For an
RXB and a GST compressor model, this output should only be on when
the Vi is at 5.0.
Output 11 (MOD 11) controls the Economizer Solenoid Valve. If the LED (D11)
for Output 11 (MOD 11) is on, check for the proper panel voltage between
position 4 and 5 on the P3 DIO connector on Digital I/O board #1. If the proper
voltage is not found, check the fuse (F11) and if the fuse is OK, check the
output module (MOD 11). If the voltage was OK, check for the proper voltage
between position 5 on the P3 DIO connector and position 11 on the terminal
strip. If voltage is OK, check for the proper voltage between position 11 and 2
on the terminal strip. If the voltage is OK, check the solenoid.
NOTE: The economizer output should only be on when the slide valve is
at or above the 90% position.
Output 22 (MOD 22) controls the Alarm Circuit. The Alarm should turn on only
when there is an alarm or shutdown. If the Alarm does not occur when these
conditions are found and the LED (D22) for Output 22 (MOD 22) is on, check
for the proper panel voltage between position 4 and 2 on the P6 DIO
connector on Digital I/O board #1. If the proper voltage is not found, check the
fuse (F22) and if the fuse is OK, check the output module (MOD 22). If the
voltage was OK, check for the proper voltage between position 2 on the P6
DIO connector and position 21 on the terminal strip.
S90-010 M
Page 17