1
00:00:09,208 --> 00:00:11,541
Right, okay, so following on, we've hooked the machine up.

2
00:00:11,791 --> 00:00:14,875
We've checked our connections,
we haven't opened the taps on the machine yet.

3
00:00:15,208 --> 00:00:19,083
So now we're on this screen on the actual console itself.

4
00:00:19,291 --> 00:00:21,458
It's now going to ask me to choose which gas it is.

5
00:00:21,625 --> 00:00:23,541
We know it's 134a.

6
00:00:23,541 --> 00:00:27,125
So I can press the button,
which does work even with the gauntlets on, which is good.

7
00:00:27,125 --> 00:00:29,208
So it's now given me a display screen.

8
00:00:29,208 --> 00:00:32,458
So the first thing we're looking
is to see how much gas is in the machine,

9
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if there's not enough, we need to change

10
00:00:36,958 --> 00:00:40,208
the setup on the machine to make sure we've got enough gas.

11
00:00:40,541 --> 00:00:44,791
OK, the machine's checked itself, knows
there's enough gas in there so we can now proceed on.

12
00:00:45,125 --> 00:00:50,291
So if we go on to an automatic setting, then the machine will run through a series of steps for us.

13
00:00:51,041 --> 00:00:54,416
OK, so it's now telling us whether we need dye,

14
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whether we actually need to add anything to the system.

15
00:00:57,833 --> 00:01:00,500
It's doing the self-test on the bottles
on the side of the machine.

16
00:01:01,041 --> 00:01:05,833
OK, so if we look closely,
we can see that it's telling us we need oil.

17
00:01:06,166 --> 00:01:08,625
Now the refrigerant system runs with gas.

18
00:01:09,208 --> 00:01:13,541
It also has oil in it
and the job of that oil, it's called PAG oil, P.A.G.

19
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What the oil does is it lubricates
the compressor in the system.

20
00:01:17,750 --> 00:01:23,166
OK, so some places when they do refrigerant replacement,
don't put the oil in to save money.

21
00:01:23,500 --> 00:01:26,666
Unfortunately,
what it does do is it will damage the compressor over time.

22
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Generally, what happens is customer has a gas recharge.

23
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After a few weeks, the compressor itself begins to fail.

24
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And the only cure for that is to de-gas a system, remove
the compressor and find out what components are damaged.

25
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If it's repairable, we can repair the system.

26
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If it's unrepairable,
then unfortunately we're going to need a new compressor.

27
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So this oil is vital to the amount of life
you get out of your system.

28
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So the more oil we put in it,
the better the compressor works.

29
00:01:53,875 --> 00:01:56,750
OK, so the system has checked it's OK.

30
00:01:57,000 --> 00:02:01,125
It's not a hybrid vehicle, so
we don't need to go through that system so we can press back.

31
00:02:02,208 --> 00:02:04,791
And that should now take us back to the original screen.

32
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OK, so we can go on to the manual set up.

33
00:02:11,333 --> 00:02:14,833
So the manual procedure,
then we've got recovery and recycle of gas.

34
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So now every time we do this system,
this machine will want to recover the gas from the system

35
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and then filter it out,
and then we can start the test with an empty system.

36
00:02:25,333 --> 00:02:28,416
If we want to test this system for a leak,
we've got two options.

37
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Now, one of the options is U.V. dye, which is on the bottom right hand side of this picture.

38
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We inject a dye into the system
when we put the gas and oil in.

39
00:02:37,750 --> 00:02:43,583
And this then allows us to use UV lighting and goggles,
and we can actually pick up any leaks from the system.

40
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Shows up bright green, glowing in the dark.

41
00:02:46,500 --> 00:02:49,833
OK, this system is more reliable than trying to leak

42
00:02:49,833 --> 00:02:53,666
test it with a system that just senses for the gas escaping.

43
00:02:54,000 --> 00:02:56,958
The only downside is if we disconnect the system incorrectly.

44
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If it sprays any gas anywhere, it'll spray

45
00:03:00,250 --> 00:03:03,166
the dye all over the place as well,
and we're going to struggle to find a leak.

46
00:03:03,416 --> 00:03:05,500
OK, so this is why we need to follow the procedure.

47
00:03:05,750 --> 00:03:09,958
So UV dye, it's in the bottles on the side
and we can inject a small amount into the system,

48
00:03:10,125 --> 00:03:13,250
doesn't damage it, and it just circulates inside the system.

49
00:03:13,250 --> 00:03:15,833
And if there's any leaks, then we can find them externally.

50
00:03:16,458 --> 00:03:20,125
OK, so if we go into the recovery cycle button, we can press that

51
00:03:20,500 --> 00:03:23,208
it's now going to ask me for the vehicle registration number.

52
00:03:23,791 --> 00:03:26,291
So for the timing of this video,

53
00:03:26,291 --> 00:03:29,916
what I'm going to do is just put the number one in
and then we can then carry on.

54
00:03:29,916 --> 00:03:32,500
For a customer's vehicle because we can get a print out.

55
00:03:32,875 --> 00:03:38,875
Then we can put the vehicle registration number in
and then we can give them a printout with how much gas

56
00:03:38,875 --> 00:03:44,625
is in their vehicle, how much gas we put back in
and to justify the invoice on the end of it. OK.

57
00:03:44,625 --> 00:03:48,000
So for the purposes of this,
I'm just going to put one in press, OK?

58
00:03:49,791 --> 00:03:54,666
So it's now telling me to connect the pipes, we've done that already, so we can just double check.

59
00:03:55,041 --> 00:03:58,125
OK, so it says connect high and low pressure

60
00:03:58,125 --> 00:04:01,875
side couplings and press, OK,
so we know our connections are good.

61
00:04:02,250 --> 00:04:03,666
We've double checked them.

62
00:04:03,666 --> 00:04:09,125
So it's also telling me that to turn the dials now
we haven't done that, we fitted them in the open position.

63
00:04:09,333 --> 00:04:11,416
So I'm just going to turn those in now.

64
00:04:14,958 --> 00:04:17,125
Again, just checking our connection.

65
00:04:20,083 --> 00:04:23,833
So we just turned that in by hand again,
when we turn it, we'll hear a slight

66
00:04:23,833 --> 00:04:27,291
hiss as the system pressures release,
that's fine because the pipes are on.

67
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We're wearing PPE, so we're not in any issues there.

68
00:04:31,083 --> 00:04:34,250
So now if we come back to the machine, we can now see that

69
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this dial the low pressure side has already gone up.

70
00:04:37,708 --> 00:04:40,416
OK, the engines off, system's not running.

71
00:04:40,625 --> 00:04:42,791
So that means we've got pressure in the system.

72
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So that's our initial check. OK.

73
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If that was reading zero, I'd suspect
then we have no gas in the system

74
00:04:49,000 --> 00:04:52,625
and then we could go and diagnose that fault
before we check for anything else.

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00:04:53,000 --> 00:04:58,000
If that reading is zero,
I would suggest a physical check of the pipes condense

76
00:04:58,000 --> 00:05:01,083
some of the system components
to see if there's any obvious damage

77
00:05:01,083 --> 00:05:03,333
or leaks before you proceed any further.

78
00:05:04,125 --> 00:05:05,666
OK, so we know that's OK.

79
00:05:05,666 --> 00:05:09,291
We've got system pressure
so we can now press okay on the console

80
00:05:09,916 --> 00:05:12,541
and now we hear the machine start up and it's

81
00:05:12,541 --> 00:05:15,083
now going to run through the evacuation procedure.

82
00:05:15,833 --> 00:05:20,750
OK, we've got a service alarm on here,
so that is telling us to replace the dryer filter

83
00:05:20,750 --> 00:05:24,791
and the oil in the pump
before we continue carrying on with this job.

84
00:05:26,083 --> 00:05:26,875
Right, OK, so

85
00:05:26,875 --> 00:05:29,791
we've sorted we've serviced our machine,
we service the dryer.

86
00:05:30,125 --> 00:05:33,291
We've kind of replenished the oil in the machine,
so now we can carry on.

87
00:05:33,916 --> 00:05:35,083
I've started the procedure.

88
00:05:35,083 --> 00:05:37,750
I've now interrupted it so we can restart it on the video.

89
00:05:37,750 --> 00:05:41,666
So if I press, OK,
I don't need my goggles or gloves for this section,

90
00:05:42,250 --> 00:05:45,333
we can now see the machine is recovering
gas on the top reading.

91
00:05:45,666 --> 00:05:47,666
We can see the bottle pressure in the machine.

92
00:05:48,083 --> 00:05:49,333
We need to keep an eye on this.

93
00:05:49,333 --> 00:05:52,083
If the temperature drops really low in your workshop,

94
00:05:52,458 --> 00:05:56,333
then sometimes it can cause issues
with withdrawing the gas purely because of it.

95
00:05:56,333 --> 00:06:01,750
A lot of modern machines now have got a bottle heater
fitted to allow the gas to flow more freely.

96
00:06:02,458 --> 00:06:07,000
OK, so we've got AC system pressure
that's running at 2.6 bar at the moment.

97
00:06:07,000 --> 00:06:09,875
So that's 15 PSI for one bar,

98
00:06:10,500 --> 00:06:13,375
OK, and the bottle temperature is 12.9 degrees.

99
00:06:13,375 --> 00:06:15,333
So that's on the bottle, on the machine.

100
00:06:15,333 --> 00:06:18,333
OK, so that's acceptable. Machine's now recovering the gas.

101
00:06:18,708 --> 00:06:21,416
So it says gas extraction from AC system,

102
00:06:21,416 --> 00:06:24,500
first phase: recovery recycling at the bottom.

103
00:06:24,500 --> 00:06:29,250
So now we can leave this machine
to kind of do its job and evacuate the system.

104
00:06:29,750 --> 00:06:33,250
What we're looking for is the total amount recovered. OK?

105
00:06:33,416 --> 00:06:37,583
For example,
if your system is running on 600 grams and we recover 200,

106
00:06:38,000 --> 00:06:40,750
the system will run, but the operation will be poor.

107
00:06:41,458 --> 00:06:44,541
And that's generally what happens, as we alluded to earlier.

108
00:06:44,875 --> 00:06:48,333
There is kind of general kind of seepage in the system over
time.

109
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It's a gas. It does.

110
00:06:51,000 --> 00:06:54,208
It does kind of degrade over time, so customers may complain

111
00:06:54,208 --> 00:06:56,958
that the air conditioning
is poor compared to another vehicle.

112
00:06:57,375 --> 00:07:01,166
So this recovered gas amount is crucial
to how the system works.

113
00:07:01,375 --> 00:07:04,833
If it's half full, it's only going to be half as efficient
as it should be.

114
00:07:05,666 --> 00:07:08,750
OK, so what we can do is we can leave this part of the system
running now,

115
00:07:09,083 --> 00:07:13,500
and recovery will carry on
until the system is completely empty of gas

116
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and then the machine will filter the gas
and then we'll move on to the next step.