Troubleshooting; Basic Operational Test; Checklist - Bosch RG8.0 Originalbetriebsanleitung

7.

Troubleshooting

7.1

Basic operational test

!
Basic operational test should only be done if there is a
serious breakdown or fault in the system component.
Basic operational test can validate proper function
of the RG8.0 / RG4.0 and point to external issues if
problems are experienced. With nothing connected
to the RG8.0 / RG4.0 and recovery / purge valve
(black) in the RECOVER position, open the inlet
control valve (blue) and outlet control valve (red)
valves. Start the RG8.0 / RG4.0 and close the in-
let valve. The RG8.0 / RG4.0 should shut-off due to
Low Pressure (LP) cut-out. Upon opening the inlet
valve, the RG8.0 / RG4.0 should restart. Upon clos-
ing the outlet valve, the RG8.0 / RG4.0 should begin
to pump up pressure on the High Side (red) gauge.
When the pressure reaches approximate 38.5 bar, the
RG8.0 / RG4.0 should shut off due to High Pressure
(HP) safety switch. Slowly open the outlet valve and
the RG8.0 / RG4.0 should restart when pressure drops
below 28 bar. This process validates normal and correct
operation of all features.
Bosch Automotive Service Solutions GmbH
Troubleshooting | RG8.0 / RG4.0 | 35
Symptom /

Checklist

Problem
RG8.0 / RG4.0 Is the RG8.0 / RG4.0
does not start plugged into the cor-
/ run when the rect voltage and fre-
main switch is quency source?
in on position.
Is there power at the
outlet / mains source?
Is the circuit breaker /
mini breaker tripped?
Does the blue
gauge read "0" or
less pressure?
Does the red gauge
show a value great-
er than 38.5 bar?
The Check basic
RG8.0 / RG4.0 operation
does not
pull down in-
to vacuum.
Check for leaks
in hoses and
connections
Check for leaks in
the A/C or refrig-
erantion system
The internal
leak test fails
en
Cause/Action
Verify power to
RG8.0 / RG4.0
Verify power to
RG8.0 / RG4.0
Reset the
circuit breaker
R LP cut-out trig-
gered. Raise
inlet pressure.
R Check the A/C or
refrigeration
system pressure.
R Open the
inlet valve.
HP cut-out triggered;
See chapter 8.3
If the RG8.0 / RG4.0
does not start af-
ter performing the
above steps, contact
Bosch for service.
Close the
RG8.0 / RG4.0
inlet valve. If the
RG8.0 / RG4.0 pulls
into vacuum and
shuts-off, proceed to
next step. If not per-
form internal leak
test as described
in section no. 7.2
Open the
RG8.0 / RG4.0
inlet valve. Close on-
ly A/C or refrigeration
system service valves.
If RG8.0 / RG4.0 pulls
down to vacuum pro-
ceed to next step.
Close the
RG8.0 / RG4.0
inlet valve. Open A/C
or refrigeration sys-
tem service valves.
Observe manifold
gauges for 15 min.
If there is pressure
rise, A/C or refrig-
eration system has
trapped refrigerant. If
not A/C or refrigera-
tion system has leaks.
Contact Bosch
customer service.
|
F 002 DG9 H00 2018-08-17