Chapter 3. OPERATION
32 | ADTS 405 Mk2 Instruction Manual-English © 2015 General Electric Company – All rights reserved.
Table 3-2: Warning Messages
The following table lists the warning messages with the possible cause and action to be taken.
No. Message Probable Cause Action
2 INVALID USER
INPUT
The numeric value entered was outside the
allowed range
Re-enter value within allowed range.
3 OPERATE CAL
ENABLE ON
STATUS PANEL
Calibration started before removing calibration
enable plate on the front panel
Refer to main fault finding chart in the
service manual.
4 ONLY VALID IN
CONTROL MODE
Selection not allowed in Leak measure mode Select controller on.
210 Ps SOFT START
TIMEOUT
The Ps controller has failed to go into control
mode
Select CONTROL again. If fails again,
refer to main fault finding chart in the
service manual.
212 Ps PRESSURE FAIL The Ps controller has detected loss of supply
pressure and automatically switched all channels
to measure mode. This can occur at very high
rates of pressure change in large volume systems
if the pumps cannot produce enough pressure.
Restore pressure supply BEFORE going
to control mode again. Refer to main
fault finding chart in the service manual.
213 Ps VACUUM FAIL The Ps controller has detected loss of supply
vacuum and automatically switched all channels
to measure mode. This can occur at very high
rates of pressure change in large volume systems
if the pumps cannot produce enough vacuum.
Restore vacuum supply BEFORE going to
control mode again. Refer to main fault
finding chart in the service manual
220 Pt SOFT START
TIMEOUT
The Pt controller has failed to go into control
mode.
Select CONTROL again. If fails again,
refer to main fault finding chart in the
service manual.
222 Pt PRESSURE FAIL The Pt controller has detected loss of supply
pressure and automatically switched all channels
to measure mode. This can occur at very high
rates of pressure change in large volume systems
if the pumps cannot produce enough pressure.
Restore pressure supply BEFORE going
to control mode again. Refer to main
fault finding chart in the service manual.
223 Pt VACUUM FAIL The Pt controller has detected loss of supply
vacuum and automatically switched all channels
to measure mode. This can occur at very high
rates of pressure change in large volume systems
if the pumps cannot produce enough vacuum.
Restore vacuum supply BEFORE going to
control mode again.
301 LEAK RATE TOO
HIGH REGAINING
CONTROL
Control mode automatically regained for aircraft
safety as leak rates too high.
Correct leak and retest.
302 OUTSIDE LIMITS
REGAINING
CONTROL
Control mode automatically regained for aircraft
safety as the measures values have drifted
outside the operating limits due to leaks.
Correct leak and retest. If leak Ps,
ensure that normal Qc pressure is
applied (e.g. 200 kts to avoid negative
airspeed).
303 ZERO OFFSET TOO
LARGE
The zero offset measured during auto-zero was
outside.
Return to maintenance depot for
calibration.
304 INITIALIZING
SYSTEM
This only occurs on main system software
upgrade.
If message occurs during normal
operation, return to maintenance depot.
305 OUTSIDE LIMIT GO
TO GROUND
Measured pressure is outside new limits selected
or power-up limits.
Control pressure to within limits.
306 SWITCH PUMPS ON Cannot select control mode with pumps off. Switch pumps on.
307 COMMUNICATION
RING FAULT-
PACKET IS
CORRUPT
Internal error. If the fault can be repeated, return to
maintenance depot.
308 UPDATING SYSTEM Software upgrade. Wait 1 minute.
309 CANNOT CONTROL Failed pump test. Check system limits.
310 PUMP TEST FAILED Pump not achieving limits. Set lower limits.
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