Fini RD 185-810, User Manual

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40069 Zola Predosa (BO) - ITALY
info@finicompressors.it
- EN -
6.2 TROUBLESHOOTING
Only qualified personnel should perform troubleshooting and or maintenance operations.
Prior to performing any maintenance or service, be sure that:
•
no part of the machine is powered and that it cannot be connected to the mains supply.
•
no part of the machine is under pressure and that it cannot be connected to the compressed air
system.
•
Maintenance personnel have read and understand the safety and operation instructions in this
manual.
Before attempting any maintenance operation on the dryer, shut it down and wait at least 30
minutes.
Some components can reach high temperature during operation. Avoid contact until system or
component has dissipated heat.
SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION
The dryer doesn't
start.
Verify that the system is powered.
Verify the electric wiring.
Intervention of the electric protection (see Q3 on the electric diagram) of the auxiliary circuit
- restore it and check the proper operation of the dryer.
RD480-810/AC-
The back panel of the dryer is open (SD door interlock safety-switch has
been activated) - make sure the back panel is correctly closed and the SD switch restored.
DMC14-
The “alarm” led is ON - see specific point.
DMC20-
The “alarm in progress” led is ON - see specific point.
The compressor
doesn’t work.
Activation of the compressor internal thermal protection - wait for 30 minutes, then retry.
Verify the electric wiring.
Where installed
- Replace the internal thermal protection
The high pressure switch P
A
has been activated - see specific point.
The low pressure switch P
B
has been activated - see specific point.
The safety thermo-switch T
S
has been activated - see specific point.
DMC14-
The “alarm” led is ON - see specific point.
DMC20-
Internal delay device – wait at least 4 min from last shut-off.
DMC20-
The “alarm in progress” led is ON - see specific point.
If the compressor still doesn’t work, replace it.
The fan of the
condenser doesn’t
work (Air-Cooled).
Verify the electric wiring.
RD 185-410-
P
V
pressure switch is faulty - contact a refrigeration engineer.
RD 480-810-
P
V1
-P
V2
pressure switches are faulty - contact a refrigeration engineer.
The fan power contactor (see V on the electric diagram) is faulty - replace it.
DMC14-
The “alarm” led is ON - see specific point.
DMC20-
The “alarm in progress” led is ON - see specific point.
If the fan still doesn't work, replace it.
DewPoint too high.
The dryer doesn't start - see specific point.
The T1 DewPoint probe doesn’t correctly detect the temperature - ensure the sensor is
pushed into the bottom of copper tube immersion well.
The refrigerating compressor doesn’t work - see specific point.
The ambient temperature is too high or the room aeration is insufficient - provide proper
ventilation (Air-Cooled).
The inlet air is too hot - restore the nominal conditions.
The inlet air pressure is too low - restore the nominal conditions.
The inlet air flow rate is higher than the rate of the dryer - reduce the flow rate - restore the
normal conditions.
The condenser is dirty - clean it (Air-Cooled).
The condenser fan doesn’t work - see specific point (Air-Cooled).
The cooling water is too hot - restore the nominal condition (Water-Cooled).
The cooling water flow is insufficient - restore the nominal condition (Water-Cooled).
The dryer doesn’t drain the condensate - see specific point.
The hot gas by-pass valve is out of setting - contact a refrigeration engineer to restore the
nominal setting.
There is a leak in the refrigerating fluid circuit - contact a refrigeration engineer.