D-11
Z MED Medical Air System
4107 9022 67.00
Appendix D - Desiccant Dryer
D.5 Troubleshooting
WARNING!
To protect the lives of patients, always
notify the appropriate medical facility
staff before performing any maintenance
or service procedures on the air
system. Compressed air levels may be
affected during maintenance or service
procedures.
WARNING!
Ensure that the dryer and associated
pre-filter(s) and afterfilter(s) are valve
isolated and fully depressurized before
attempting to remove or disassemble any
subassemblies or components. Failure
to do so may result in serious personal
injury and/or equipment damage.
WARNING!
Some of the following trouble-shooting
checks are conducted while the dryer’s
electrical power supply is energized.
THEREFORE, A POTENTIAL ELECTRICAL
SHOCK HAZARD EXISTS. A qualified
electrical technician should conduct
these checks. The dryer’s electrical power
supply must be deenergized before any
electrical maintenance or repair work is
conducted.
CAUTION:
Each component has been selected
to compliment the performance of the other
components of the system. Therefore, use of
unauthorized parts or improper operation will
degrade system performance.
IMPORTANT:
Water molecules can diffuse
through a pinhole size leak even though pres-
sure inside the piping is several hundred PSIG. It
is not at all uncommon to have a minute pinhole
leak in a gas line cause an increase in dew
point from -40ºF to -10ºF at a distance of forty or
more feet downstream of the leak.
Problem
Possible Causes
Solution
Dryer not
cycling
Main power disconnected
Power failure
Main fuse blown
Fuse blown in control circuit
Timer failure
Dryer selector switch in off position
Loose or faulty connection
Switching valve failure
Main power disconnected
Power failure
Main fuse blown
Fuse blown in control circuit
Timer failure
Dryer selector switch in off position
Loose or faulty connection
Switching valve failure
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