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Trouble shooting
Daily inspection and periodic inspections will prevent the greater portion of air dryer troubles.
In the event of troubles or complaints as listed, follow the correction procedures to correct the difficulty.
Complaints
Water comes
out from main
tank.
Drain valve
fails to drain.
Cause
Desiccant has been saturated.
Cut–off pressure of governor is so low that
purge valve wonŮt open.
Failure to change desiccant or oil filter within
scheduled period.
As the purge time is less than the rated
time (50 seconds), desiccant is not recovered
sufficiently)
Freezing of air dryer due to heater trouble
Failure to regularly change desiccant
No operation of purge valve due to the entry
of foreign substances into drain valve.
Correction
Check and drain the main tank until the desiccant is dried
up.
Increase pressure for governor to 6kg/cm
2
or higher.
Change desiccant kit at end of every 12 months or
90,000km operation.
1. If cut–off pressure of governor and closing pressure
of relief valve are low, purge time also is shortened,
resulting in failure in recovery of the desiccant.
2. In the case of purge by relief valve, if cut–off pres-
sure of governor and closing pressure of relief valve
are low, purge time also is shortened, resulting in fail-
ure in recovery of the desiccant.
1. Change faulty heater.
2. When the trouble is located in thermostat, change
it.
Change desiccant kit at end of every 12 months or
90,000km operation.
Disassemble and check the valve, and replace the valve,
if necessary.
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