Problem Solving - Quincy Compressor QED 650 Instruction And Maintenance Manual

7

Problem solving

7.1 Problem solving
Valve on inlet collector
Attention
Faults and remedies (general)
Condition
- Pressure dew-point too high
- Condenser pressure too high
or too low on air-cooled dryers
- Compressor stops or does not
start
90
Use only authorized parts. Any damage or malfunction caused by the use of unauthorized
parts is not covered by Warranty or Product Liability.
Apply all relevant Safety
Before carrying out any maintenance or repairs on the dryer, stop the dryer and switch off
the voltage.
Open the isolating switch to prevent an accidental start.
Isolate the dryer from the air net and depressurize by opening valve (5) on inlet collector
(6).
Fault
Air inlet temperature too high
Ambient temperature too high Check and correct; if necessary, draw
Air inlet pressure too low
Dryer capacity exceeded
Shortage of refrigerant
Refrigerant compressor does
not run
Evaporator pressure too high
Condenser pressure too high
Automatic drain system
clogged
Fan control switch out of order Replace
Fan or fan motor out of order
Ambient temperature too high Check and correct; if necessary, draw
Condenser externally clogged Clean condenser
Electric power supply to
compressor is interrupted
precautions.
Instruction book
Remedy
Check and correct; if necessary,
install a pre-cooler
cooling air via a duct from a cooler
place or relocate dryer
Increase inlet pressure
Reduce air flow
Have circuit checked for leaks and
recharged
See below
See below
See below
Have the system cleaned
Check fan/fan motor
cooling air via a duct from a cooler
place or relocate dryer
Check and correct as necessary
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