4–7
T-374
Membrane Pressure
Transducer (MPT) Reading
High
Water separator or air filters clogged
Remove housings and clean debris,
verify WDV opening.
EverFRESH piping blocked
Inspect plumbing, hoses, fittings, check
valve, and orifices for signs of
blockage. Repair as required.
Nitrogen membrane defective
Operating the system for a period of
time can “dry out” the membrane and
increase efficiency. Run a Pre-trip
“AUTO CA” test to check membrane
efficiency. Allow the system to operate
for one hour and check nitrogen levels.
If nitrogen percentage is increasing,
continue to dry out. If not, replace the
membrane.
EverFRESH Air Compressor
(EAC) Runs But O
2
Does
Not Come Down
Fresh air vent open
Check vent, close.
Leak in piping
Check system for leaks.
Sensor defective
Check sensor alarms. Replace as
needed.
Nitrogen membrane defective
Run P20 test to validate nitrogen
concentration.
Container box not sealed
Perform pressure decay test.
Leaky cylinder head
Perform minor rebuild.
EverFRESH Air Compressor
(EAC) Runs But O
2
Does
Not Come Up
EverFRESH Air Valve (EA) does not open Check F3 fuse.
Run a P20 PTI test. P20-2 will check for
proper valve operation: electrical and
mechanical.
Water separator not draining
Clean inspect water separator housing.
Particulate filters not draining
Inspect / replace particulate filters.
EverFRESH Air Compressor
(EAC) Runs But CO
2
Does
Not Come Down
Nitrogen membrane defective
PTI check. Refer to
CO
2
Does Not Come Up
Leaky container box
Inspect container, verify fresh air vents
closed, if possible check curtain install.
Produce not capable of raising CO
2
Some produce does not generate
much CO
2
and needs to be pre-
charged with gas. If charge leaks out
can only be replaced by recharging.
In CO
2
Injection Mode And
Not Maintaining Setpoint
Low CO
2
bottle pressure
Check bottle pressure gauge to ensure
bottle delivering 50 PSIG.
Verify hose from tank to CO2 injection
input is depressing the Schrader valve
on the inlet.
Leaky container box
Inspect condition of the box. Verify the
fresh air panel is closed. If possible,
check condition of the curtain.
CO
2
Injection Solenoid failure
Run a P20 test and check P20-6
results. Replace if necessary.
CO
2
Injection Pressure
Transducer (IPT) Not
Reading In Range
Restricted CO
2
input to the system
Remove CO
2
source and run a P20
test. Validate the results of P20-7. If it
fails, replace the sensor.
Condition
Possible Causes
Recommended Actions
Summary of Contents for EverFRESH
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Page 56: ...T 374 5 26 4 Note the orientation of the check valve 5 Reinstall in reverse order ...
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Page 67: ...8 1 T 374 SECTION 8 SCHEMATICS DIAGRAMS STANDARD UNITS Figure 8 1 Legend Standard Units ...
Page 68: ...T 374 8 2 Figure 8 2 Schematic Standard Units Page 1 ...
Page 69: ...8 3 T 374 Figure 8 3 Schematic Standard Units Page 2 ...
Page 70: ...T 374 8 4 Figure 8 4 Wiring Diagram Standard Units ...
Page 72: ...T 374 9 2 Figure 9 2 Schematic Units with CO2 Injection Page 1 ...
Page 73: ...9 3 T 374 Figure 9 3 Schematic Units with CO2 Injection Page 2 ...
Page 74: ...T 374 9 4 Figure 9 4 Wiring Diagram Units with CO2 Injection ...
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