Introduction; Problems And Solutions - Hertz HSC serie Bedienungshandbuch

CHAPTER 7

7.1 INTRODUCTION

The information in this section is based on the experience gained by the service activities and tests conducted
at factory.
The indications and reasons of failures are ordered according to the results obtained from the warnings of our
company and the experience of the service personnel.
According to the structure of the compressor, as the systems and failures are interrelated; prior making any
repair or part replacement the reason of failure should be determined.
For the problems to be encountered, it is beneficial to make an eye inspection.
Good Tracing of failure, prevents the undesired damages that may occur during repair.
Firstly;
Check the electrical connections for the possibility of looseness.
Check the parts that may be influenced from short circuit and heat.
Check the damage and looseness that may form at air and oil circuit hoses, pipes and connections.
If you have tried all the ways described in this handbook for eliminating the failure and the problem still
continues; please contact our company or service department.
From the point of your speed and reliability having all kinds of corrective action,
maintenance and repair works to be done at our service companies is the best way for your
compressor and your facility. All kinds of works carried out without sufficient knowledge may
cause wrong results, unnecessary interruptions of your facility or more costly damages.

7.2 PROBLEMS AND SOLUTIONS

1-
COMPRESSOR DOES NOT OPERATE
1- NO POWER
CHECK THE VOLTAGE FROM INPUT TERMINAL BLOCK
2- CONTROL OR INPUT FUSE IS BLOWN, MAIN SWITCH TRIPPED
CHECK THE FUSES
3- VOLTAGE IS LOW, UNSTABLE OR REVERSED
OBSERVE THE WARNING ON THE CONTROL PANEL
4-COMPRESSOR HAS STOPPED FOR ANY KIND OF FAILURE
OBSERVE THE WARNING ON THE CONTROL PANEL.
5-THE COMPRESSOR IS RUNNING WITHOUT DISCHARGING INTERNAL PRESSURE.
AFTER STOPPING; THE COMPRESSOR DONT WORK FOR 1 MINUTE FOR DISCHARGING OF INTERNAL
PRESSURE
2-
COMPRESSOR IS HARDLY WORKING
1- THE CROSS SECTION OF POWER CABLE IS INSUFFICIENT.
THIS PROBLEM CAN BE ENCOUNTERED ON CONNECTIONS MADE THINNER CABLE DUE TO VOLTAGE
LOSS. WHEN YOUR COMPRESSOR IS IN STOP POSITION, MEASURE THE INPUT VOLTAGE AND WHILE
MEASURING RUN THE COMPRESSOR. IF THE VOLTAGE IS DECREASE % 5 (380> 360) AND BELOW, THE
CABLE CROSS SECTION IS INSUFFICIENT. MAKE THE CONNECTION WITH A SUITABLE CROSS SECTION.
2- VOLTAGE IS LOW
IF THE LINE VOLTAGE IS % 5 LESS THAN THE COMPRESSOR FACTORY ADJUSTED VOLTAGE, THE
PROBLEM MAY ARISE FROM THE NETWORK OR FROM THE ESTABLISHED POWER OF YOUR FACILITY.
3- THE AMBIENT TEMPERATURE IS LOW
IF THE AMBIENT TEMPERATURE IS LESS THAN + 2 °C, THE OIL MAY THICKEN AND THIS MAY ENFORCE
THE OPERATION OF YOUR COMPRESSOR.
4-INTAKE VALVE IS DEFECTED
THE INTAKE VALVE IS CLOSED AT FIRST RUN UP. IF THERE IS A MECHANICAL PROBLEM, IT MAY STAY
OPEN. THIS WAY THE COMPRESSOR TRIES TO START UP AGAINST LOAD AND HARDLY SPEEDS UP.
WHEN THE COMPRESSOR IS AT STOP AND THERE IS NO INTERNAL PRESSURE, OBSERVE THAT THE
INTAKE CLAPET IS FULLY CLOSED. THE CLAPET MIGHT BE STUCK AT OPEN POSITION. INFORM THE
SERVICE.
5-THERE IS A MECHANICAL PROBLEM AT MOTOR OR AIREND
AFTER DE-ENERGIZING THE COMPRESSOR CHECK WHETHER THE BELTS ARE FREELY ROTATING. IF
THE ROTATION IS MORE DIFFICULT THAN NORMAL, THERE MAY BE MECHANICAL DAMAGE AT MOTOR
OR AT AIREND; INFORM THE SERVICE.
TROUBLESHOOTING
56