Parker PDRD Series, User Manual

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5
PDRD250
English
List of alarms/warnings
HP High Pressure Alarm
LP Low Pressure Alarm
Ld Low Dew Point Alarm
Lt Low Evaporation Temperature Alarm
Ht
High Compressor Discharge Temperature Alarm = T>
248 ˚ F (120 ˚ C).
Dew Point Sensor Warning
dSE The measured temperature must return within its normal
range.
Hd
High Dew Point Warning
Hd
Automatic reset when the dew point = A6 --- 4 ˚ F (2 ˚ C).
HSE Discharge temperature sensor Warning
Sr
Scheduled Maintenance Warning
Sr
See par. 5.2 and 6.3.
6 Maintenance
a) The machine is designed and built to guarantee continuous
operation; however, the life of its components depends on the
maintenance performed;
b) when requesting assistance or spare parts, identify the ma-
chine (model and serial number) by reading the dataplate lo-
cated on the unit.
6.1 General instructions
!
Before any maintenance, make sure:
S
the pneumatic circuit is no longer pressurized;
S
the dryer is no longer powered.
!
Risk of electric shock can cause injury or death.
Disconnect all remote electric power supplies before servicing.
Y
Always use the Manufacturer’s original spare parts: other-
wise the Manufacturer is relieved of all liability regarding ma-
chine malfunctioning.
Y
In case of refrigerant leakage, contact qualified and author-
ized personnel.
Y
The Schrader valve must only be used in case of machine
malfunction: otherwise any damage caused by incorrect refriger-
ant charging will not be covered by the warranty.
6.2 Refrigerant
Z
Charging: any damage caused by incorrect refrigerant replace-
ment carried out by unauthorized personnel will not be covered
by the warranty.
Y
At normal temperature and pressure, the R407C refrigerant
is a colourless gas classified in SAFETY GROUP A1 --- EN378
(group 2 fluid according to Directive PED 97/23/EC).
!
In case of refrigerant leakage, ventilate the room.
6.3 Preventive Maintenance Programme
To guarantee lasting maximum dryer efficiency and reliability:
Maintenance
Activity Description
Maintenance Interval
(standard operating conditions)
Activity
Da
ily
W
eekly
4M
on
th
s
12
M
ont
hs
36
M
ont
hs
Check POWER ON indicator is lit.
Check control panel indicators.
Check condensate drain.
Clean condenser fins.
Check electrical absorption.
Check refrigerant leaks.
Depressurize the dryer.
Complete drain maintenance.
Depressurize the dryer.
Replace pre--- and post---filter ele-
ments.
Check temperature sensors. Replace Check temperature sensors. Replace
if necessary.
Dryer maintenance kit.
check service