Troubleshooting - Yetter GERMINATE UNIFORMITY 2940 Operator's Manual

Problem
Tank pressure drops when
compressor shuts off
Compressor runs
continuously/air flow lower
than normal, Compressor
Run Time High warning on
cab controller if compressor
runs continuously for 15
minutes
Compressor will not run
No air output from the RU,
RD, and WT ports even
though pressure is
commanded and tank
pressure reads 75psi or
greater
Low or sporadic tank
pressure reading
Air leaking out regulator knob
Compressor struggles to
build/won't build 145psi
No connection to Thrasher or
No connection between VDM
& Thrasher
Excessive noise from
compressor
Excessive moisture in
discharge
Hydraulic motor front seal
leakage
Row cleaners do not react
uniformly
Troubleshooting Guide
Cause
1. improper check valve function
2. loose connections/ air leak
3. water separator drain valve
leaking
1. excessive air usage
2. loose connections/air leak
3. Improper pressure switch function
4. clogged air filter element
5. worn compressor
6. defective safety valve
7. tank drain valve open
8. water separator valve leaking
1. air system is off
2. hydraulics disengaged
3. no power to control box
4. communication harness
connection issue
5. shut off psi(145psi) reached
6. worn compressor
7. Improper pressure switch function
1. air system is off
2. no power to the VDM
3. 75psi of tank pressure not
achieved
4. improperly functioning Mac Valves
5. communication harness
connection issue
water separator/regulator assembly
plumbed incorrectly
flow control valve adjustment needed
improper communication harness
connection between VDM and
Thrasher
1. loose mounting bolts
2. worn bearings
3. cylinder or piston is worn
4. compressor over speeding
1. excessive water in air tank
2. high humidity
1. case drain clogged or unplugged
2. case drain not plumbed correctly
1. check each row cleaner for drag
Corrective Action
1. replace check valve on compressor
2. perform leak check (see pages 53 & 54)
3. replace water separator drain valve
1. decrease air usage
2. perform leak check (see pages 53 & 54)
3. replace pressure switch
4. clean/replace filter element
5. replace compressor
6. replace safety valve
7. close tank drain valve
8. replace water separator valve
1. press ACTIVATE SYSTEM
2. engage compressor hydraulic circuit
3. check power connections from battery to
control box, check 2940-166 breaker at battery
4. check harnessing from compressor to the
control box
5.compressor will restart after tank pressure drops
below 125psi
6. replace compressor
7. replace pressure switch
1. press ACTIVATE SYSTEM
2. check power connections from battery to VDM,
check 2940-166 breaker at the battery
3. allow the compressor to build at least 75psi
4. replace Mac Valves as needed
5. check the end of all connectors to make sure
terminal pins are all flush to the end of the male
connectors and the connectors are seated tightly
plumb water separator/regulator correctly
(air compressorwater separatorexit regulator
sideenter control box inlet port)
flow control valve adjustment needed (see page
53 for instructions)
1. Make sure the lights on the Thrasher are
laminated
2. Make sure 2940-654 Thrasher to Midac is
plugged in
1. tighten bolts
2. replace compressor
3. rebuild compressor
4. check compressor RPMs (see page 53) & slow
motor down if needed, hydraulic plumbing of the
compressor is incorrect (see page 28 - 29)
1. drain tank, drain tank more frequently
2. move compressor to area with less humidity.
1. remove case drain plumbing and clean out
debris/obstruction, replace seal
2. Plumb case drain according to the instructions
(see pages 30), replace seal
1. replace bushings/parts causing drag or check
hardware tightness
81