mycom 2016LMC User Manual

2200LZJE-HO-C6-N_2013.12.
Chapter 6 Troubleshooting
Compound 2-stage Screw Compressor 2016**C
6-6
Symptom Direct cause Root cause Action
08
Leak from
mechanical
seal
Sliding surface is
roughened due to
overheating.
Started and
stopped too many
times.
* In case of
standard
equipment, "four
or more times per
hour" is
considered
"frequent/too
many".
If heat load is less than the level set
by the equipment's design
conditions, review the operating
conditions and set control such that
equipment is started/stopped less
frequently.
In case of capacity control
malfunction, see "Capacity control
malfunction" in item No. 11.
The amount of
lubricant contained
in refrigerant gets
smaller, resulting in
decreased
viscosity.
In case of liquid flow-back, remove
the cause(s).
If oil heater or devices on its control
circuit are defective, replace the
defective part.
Overheated
operation
See the causes in item 02,
"Insufficient refrigerant flow".
Oil supply
temperature is high.
See the causes in item 07, "Oil
supply temperature is high".
Machine is stopped
for a long time.
(No oil film on
sliding surfaces)
User-specific
conditions, such as
intermittent heat
load
If machine is sometimes stopped
longer than a week, take either of
the following measures: (i) Manually
operate oil pump alone and turn the
rotor shaft of the compressor.
(ii) Attach an oil pot for supply oil to
the seal cover.
Deteriorated part(s) Hardened O-ring If deteriorated over time, replace.
For other specific causes, see the
causes/action for symptom
"Overheating of sliding surface".
Swelled O-ring
* This occurs when
the lubricant of
refrigerating
machine contains
large amount of
refrigerant.
In case of liquid flow-back, remove
the cause(s).
If oil heater or devices on its control
circuit are defective, replace the
defective part.
Deteriorated seal
ring/mating ring
If deteriorated over time, replace.
For other specific causes, see the
causes/action for symptom
"Overheating of sliding surface".
Incompatibility of
lubricant and
operating
conditions (such as
working
temperature range
or refrigerant)
Unsuitable lubricant
was selected, or
operating
conditions have
changed after
installation of the
equipment.
If possible, review the operating
conditions.
If not, see "4-1 Lubricant
(Refrigerant Oil)" to select suitable
lubricant and replace the whole
quantity.
Poor contact of
sliding surfaces
Foreign matter
attached to sliding
surfaces, due to
contaminated
lubricant.
Replace the whole quantity of
lubricant.
Install bypass filter to oil supply line.

mycom 2016LMC Specifications

General

Brand	mycom
Model	2016LMC
Category	Air Compressor
Language	English