Devair PROdry, Инструкция по эксплуатации, Страница: 6 / 16

6
TROUBLESHOOTING GUIDE
C) Fault Alarm
A) Water downstream of dryer 1. Residual free moisture remaining in
downstream pipelines
2. Air by-pass system is open
3. Inlet and Outlet connections are
reversed
4. Temperatures surrounding air lines
downstream of dryer have dropped
below dryers dew point rating.
5. Excessive free moisture (bulk liquid)
at dryer inlet
6. Condensate not being automatically
drained
Drain mechanism is clogged or
inoperative.
Drain line is restricted or frozen.
7. Dryer overloaded resulting in
elevated dew point.
8. Refrigeration system not functioning
properly resulting in elevated dew
point.
1. Inlet air strainer clogged
2. Excessive air flow
3. Separator filter clogged.
4. Freezing of moisture in evaporator
because of refrigeration system
improperly functioning.
1. Dryer overloaded resulting in high
air outlet temperature.
2. Refrigeration system not function-
ing properly resulting in high air
outlet temperature.
3. Unit functioning normally but
thermostatic switch is malfunction-
ing or not securely mounted.
Blow out system with dry air
Check valve positions
Check for correct connection
Insulate or heat trace air lines exposed
to low ambients or dry air to lower
dew point
Install separator ahead of dryer
B) High pressure drop across
dryer
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION
Replace drain mechanism if inoperative
Open drain line
Check inlet air temperature and
pressure, flow rate (compressor
capacity) and ambient air temperature
See D below
Clean inlet air strainer
Check flow rate
Replace filter sleeve
See D below
See A 7
See D below
Contact qualified refrigeration repair-
man or manufacturer’s service depart-
ment
Check power to unit
Close disconnect switch
Check for continuity
Have electrician check electrical
connections
Check minimum/maximum tempera-
ture ranges
Clean ambient air filter
Clean condenser
Replace fan motor or fan control
switch
Contact qualified refrigeration repair-
man or manufacturer's service depart-
ment
Check wiring
D) Refrigeration system not
functioning properly
1. When dryer on/off switch in on or
"I" position
2. Refrigerant compressor cycles on
and off
a. Power failure
b. Line disconnect switch open
c. Blown fuses, open breaker
d. Faulty wiring, loose terminals
a. High or low ambient conditions
b. Ambient air filter clogged
c. Condenser fins clogged
d. Fan motor or fan control switch
malfunction
e. Refrigerant leak
f. Low voltage