Thermo Scientific PARTISOL 2000, Service Manual

Page: 21 / 96

Revision
B.000
Service
Manual,
Partisol
Model
2000
Air
Sampler
S
ECTION
2
: T
ROUBLESHOOTING
G
UIDES
P
AGE
2-13
2.2.6.
K
EYPAD
T
ROUBLESHOOTING
F
LOW
C
HART
2.2.7.
A
MBIENT
P
RESSURE
E
RROR
(P)
F
LOW
C
HART
No response
from keypad
Perform system
reset.
Only one or
several keys bad
If only one key is bad,
keypad is probably
defective.
Response
from keys on
keypad?
Replace cable
R&P P/N 51-002376
Replace keypad with
known good one
R&P P/N 55-002345
New keypad
fix problem?
Return defective keypad
for replacement.
Yes
KEYPAD TROUBLESHOOTING FLOW CHART
Yes
Continuity OK?
No
Error code
“P”
This error code occurs if
the ambient pressure is
out of range.
The pressure must be
greater than 0.4 atm to
be valid.
Place multimeter across test
points AMBPRESS (blue) and
AGND (black) on interface
board (see note 1).
Voltage
nominal?
Resume normal
operation.
Yes
No
Note:
1.The voltage at this test point is related to the
pressure according to the following
equation:
V * 0.2194 + 0.104215 = P (atm)
Go to the statistics screen
and observe the ambient
pressure reading.
Perform system
reset.
Yes
Problem
corrected?
AMBIENT PRESSURE TROUBLESHOOTING FLOW CHART
Check continuity of
cable between P15
(interface board) and
P70 (keypad).
Replace interface/CPU
board assembly
R&P P/N 50-005496
& 10-002407
No response
No
Replace interface/CPU
board assembly
R&P P/N 50-005496
& 10-002407
No