APTech Series AK M86 - Manual (Page 13)

AK M80/86 Manual P/N 00-15000010 Rev 3
6. TROUBLESHOOTING
The most common problem conditions and possible causes/corrections are described below. Please
contact the factory for assistance with other problem conditions or to discuss a specific problem in more
detail.
6.1. External leak
Possible causes:
Connection not assembled properly with Teflon tape.
Connection not tightened properly.
Correction:
Inspect equipment to determine source of the leak. Repair leak by disassembling the connection,
inspecting parts, and reassembling using good shop practice.
If the leak is from the bonnet of the regulator, then AP Tech recommends that the AK M80/86
manifold be sent back to the factory for repair (however, a field repair kit is available).
6.2. Relief valve is opening and venting gas
Possible causes:
Relief valve opens below set pressure.
Seat leak on AK M80/86 crossover regulator causing an overpressure condition.
Correction:
Remove and bench-test relief valve. Replace relief valve if defective.
If relief valve operates correctly, then temporarily install a pressure gauge in relief valve port of AK
M80/86 manifold and monitor pressure. A continuous pressure rise after initial pressurization
indicates a seat leak on the AK M80/86 crossover regulator. If the problem is a seat leak, then AP
Tech recommends that the AK M80/86 manifold be sent back to the factory for repair (however, a
field repair kit is available).
6.3. High delivery line pressure
Possible causes:
Other gas source from point of use is pressurizing delivery line.
Seat leak or high creep on line regulator.
Regulator knob adjusted incorrectly.
Correction:
Check to see if a different gas source can be pressurizing the line.
If another gas source is not the cause of the high delivery line pressure, then shut off the supply to the
point of use, close the line regulator, vent the delivery line, and readjust to desired outlet pressure. If
the line outlet pressure continues to rise above the set pressure, then it is likely the line regulator has a
seat leak and AP Tech recommends that the AK M80/86 manifold be sent back to the factory for
repair (however, a field repair kit is available). If the outlet pressure does not change significantly,
then it is likely the regulator was adjusted incorrectly.
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