Troubleshooting Guide - Champion CRH Series Instruction Manual

TROUBLESHOOTING GUIDE

SYMPTOM
A) Water downstream of dryer
B) High pressure drop across
dryer
C) Fault Alarm
D) Refrigeration system not
functioning properly
1. When dryer on/off switch in on
or "I" position
2. Refrigerant compressor cycles on
and off
6
POSSIBLE CAUSE(S)
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 automati-
cally drained
Drain mechanism is clogged or
inoperative.
Drain line is restricted or frozen.
7. Dryer overloaded resulting in el-
evated dew point.
8. Refrigeration system not function-
ing properly resulting in elevated
dew point.
1. Inlet air strainer clogged
2. Excessive air flow
3. Separator filter clogged.
4. Freezing of moisture in evapora-
tor because of refrigeration
system improperly functioning.
1. Dryer overloaded resulting in high
air outlet temperature.
2. Refrigeration system not func-
tioning properly resulting in high
air outlet temperature.
3. Unit functioning normally but
thermostatic switch is malfunc-
tioning or not securely mounted.
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
CORRECTIVE ACTION
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
Replace drain mechanism if inopera-
tive
Open drain line
Check inlet air temperature and pres-
sure, 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
repairman or manufacturer's service
department
Check power to unit
Close disconnect switch
Check for continuity
Have electrician check electrical con-
nections
Check minimum/maximum tempera-
ture ranges
Clean ambient air filter
Clean condenser
Replace fan motor or fan control
switch
Contact qualified refrigeration re-
pairman or manufacturer's service
department
Check wiring