RH SERIES—HIGH TEMPERATURE SECTION 2
36
The unit will not run or
cycles ON and OFF
Line disconnect switch is
open.
Close the start or discon-
nect switch
If the dryer is not operating, check the
disconnect switch or circuit breaker to
be certain it is turned ON.
Faulty refrigerant com-
pressor or controls
Determine the cause and
make correction
Failure of compressor to run may be
caused by several factors.
A qualified refrigeration technician
should check all electrical and refrig-
eration controls, or the factory should
be contacted if the unit is under war-
ranty
Excessive compressed
air inlet temperature
Designed conditions and
correction factors as
described in the product
literature must be strictly
followed. Ensure that the
dryer is working well
within the maximum con-
ditions
The dryer is designed for working
within the calculated maximum condi-
tions.
Should the conditions be exceed, the
dryer will be overflow, dew point will
go up and protecting devices can get
switched off
Excessive ambient tem-
perature
Designed conditions and
correction factors as
described in the product
literature must be strictly
followed. Ensure that the
dryer is working well
within the maximum con-
ditions
A high ambient temperature may
cause the refrigerant system to oper-
ate at higher than normal pressures.
Result will be a higher than normal
evaporator temperature.
Important: there should be adequate
air circulation around the dryer, and
proper ventilation in the equipment
room. This should guarantee a low
enough ambient temperature
Clogged condenser fins Clear fins of all obstruc-
tions
The clogged fins in the condenser will
restrict the air passage and reduce
the refrigeration capacity, causing
high temperature in the evaporator.
Fins should be periodically checked
and cleaned
Shortage of refrigerant Fix the leak and add the
appropriate amount of
refrigerant into the sys-
tem.
Loss of refrigerant will cause improper
functioning.
A qualified refrigeration specialist
should perform the necessary repairs,
or factory should be contacted if the
unit is under warranty
PROBLEM POSSIBLE CAUSE REPAIR COMMENTS
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