Emerson Copeland Scroll QF115L User Manual page 11

The use of additives without adequate testing may result
in malfunction or premature failure of components in the
system and, in specific cases, in voiding the warranty on
the component.
Unbrazing System Components
Warning
Oil-refrigerant mixtures are highly fl ammable. Remove all
refrigerant before opening the system. Avoid working with
an unshielded fl ame in a refrigerant charged system. Before
opening up a system, it is important to remove all refrigerant
from both the high and low sides of the system. If the
refrigerant charge is removed from a scroll-equipped unit
from the high side only, it is possible for the scrolls to seal,
preventing pressure equalization through the compressor.
This may leave the low side shell and suction line tubing
pressurized. If a brazing torch is applied to the low side while
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the low side shell and suction line contain pressure, the
pressurized refrigerant and oil mixture could ignite when
it escapes and comes in contact with the brazing fl ame. To
prevent this occurrence, it is important to check both the
high and low sides with manifold gauges before unbrazing.
Instructions should be provided in appropriate product
literature and assembly (line repair) areas. If compressor
removal is required, the compressor should be cut out of
system instead of unbrazing.
Dismantling and Disposal
Removing oil and refrigerant
• Do not disperse in the environment.
• Use the correct equipment and method of removal.
• Dispose of oil and refrigerant properly.
• Dispose of compressor properly.
Appendix
Fault Diagnostic Code
Code Description
0 ON Normal compressor operation
0 FLASH Normal compressor off
If it fl ashes during operation, follow
0 FLASH
Emerson Wiring Diagram
1 FLASH Motor overheat
2 FLASH High discharge temperature
3 FLASH Low oil level
4 FLASH Low Oil Differential Pressure (HP - LP)
5 FLASH Motor Thermistor failure
Discharge port temperature sensor
6 FLASH
failure
7 FLASH PHE inlet temperature sensor failure
8 FLASH PHE outet temperature sensor failure
Oil temperature sensor failure or high oil
9 FLASH
temperature
3 and F Alternate display Less oil level, still OK but soon dangerous
5 to 9 Number FLASH All sensors
Number
3 Low oil level/Require manual reset
FLASH/'.' on
Number Low differential oil pressure/require
4
FLASH/'.' on manual reset
Fault diagnostic code is visible through
•
a transparent window on the cover
• The code and description can be found
inside of the cover
Status Compressor Action
Normal Normal compressor operation
Normal Normal compressor standby
Fault EXV will not work so compressor must stop
Compressor shutdown and automatic reset after 10 min
Fault
delay
Compressor shutdown and automatic reset after 10 min
Fault
delay
Compressor shutdown and automatic reset after 5 min
Fault
delay
Compressor shutdown and automatic reset after 3 min
Fault
delay
Compressor shutdown and automatic reset after 10 min
Fault
delay
Compressor shutdown and automatic reset after 5 min
Fault delay under open/short circuit failure / 10 min delay under
other failure mode
Fault Compressor don't shutdown
Fault Compressor don't shutdown
Compressor don't shutdown under oil temperature sensor
failure, but oil temperature protection function fail .
Fault Show alarming under high oil temperature, compressor
shutdown if oil temperature continue to increase and
automatic reset after 10 min delay
Normal Show alarming and continue running. Give precaution
When power on 1st time, if any sensor among motor
thermistor, discharge temperature sensor, PHE inlet
Fault
temperature sensor, PHE outlet temperature sensor and oil
temperature sensor is wrong, immediately locked
The 4th low oil level in 1 hour, compressor shutdown and
Fault
locked, manual reset (cut off power)
The 4th low differential pressure in 1 hour, compressor
Fault
shutdown and locked
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