MSL MSF-390 Troubleshooting guide

MSL COMPRESSOR Co., Ltd.
553, Seorun-dong, Pocheon-si, Gyunggi-do, South Korea 487-030
T) 82-31-541-7000 F) 82-31-542-2999 www.mslcomp.com
MSF-390
Rev.05
AIR COMPRESSOR MANUAL
OPERATION & MAINTENANCE

- 2 -
General Notice
This operation manual contains the operating and maintenance procedures necessary to
safely run your MSL Compressor. We strongly recommend that you read this manual
thoroughly prior to operation and follow all the safely precautions precisely. Damage
resulting from any deviation from these instructions is excluded from warranty and liability
for this product. Be sure to pay attention to the following points.
1. Fill only tanks with a valid hydrostatic test date
2. Never exceed the working-pressure rating indicated on the tank
3. Do proper maintenance of the filtration system
4. Do regular drainage of the condensate
5. Avoid contaminated air to reach the air intake
6. Do not exceed maximum rpm
Description of Function
The MSF-390 is a 3 stage compressor designed to fill scuba tanks with compressed air.
Air is supplied through air intake filter. The air then enters the 1st stage with a tiny
quantity of oil-vapour and is compressed to 3 bar. From there it passes a cooling pipe to
the 2nd stage, where it is compressed to 45 bar. After that the water and oil are removed
in a (mechanical-expansional) separator and the air is cooled in the next cooling-pipe
before entering stage 3. There it is compressed to the final pressure of 220 bar and then
led to the next filter, where again oil and water are separated through expansion before
the air passes through an activated carbon filter. The filter exit-port is connected to a high
pressure hose, which ends with a pressure-gauge and a tank-connection (filling-valve
assembly).
Each stage has its own safety valve, set and sealed by the manufacturer. The final one is
adjusted from 220 to 330 bar, depending on specification.
Starting the compressor for the first time
1. Place compressor with keeping a distance of at least 50 cm from any walls (Air Temp.
max 40 ℃)
2. Make sure your location is properly vented due to exhaust gases (Engine type)
3. Check oil level on Engine
4. Check fuel level on Engine
5. Check connections
6. Check oil level on compressor
7. Check if air filter cartridge is in place
8. Make sure all filling valves are closed
9. Start compressor
10. Run compressor to max. pressure
11. Check if safety valve opens at Max. pressure
12. Check compressor unit for air leaks
13. Check drain valves of water separators
14. Turn off compressor
15. Release pressure by filling valves

- 3 -
WARNING
WARNING
Safety Precautions
Please refer to the Safety Precautions and use accordingly. The precautions specifically
mentioned in this reading material are of great importance concerning safety, so please follow
as noted. The dangers of misuse are divided into three categories.
󰏗DANGER : Ignoring this notice may result in death and/or fatal injury and can face
extreme danger.
󰏗WARNING : Ignoring this notice may result in death and/or fatal injury.
󰏗CAUTION : Ignoring this notice may result in injury and damage to property.
󰏗CAUTION
￭ Use only tanks that have been inspected, and never pass the pressure limit as
noted on the tank.
￭ Do not use contaminated gases. Do not use in an area with heavy dust.
￭ When not in use, keep in an open area.
￭ Filter should be replaced regularly as noted in the instruction manual.
(Important: Refer to filter replacement instructions prior to replacement)
￭ Do not inject oil or fuels during use.
￭ To prevent overheating, cool down compressor after 30 minute operating.
￭ User should master instructions and safety precautions in this manual prior to
using the equipment.
￭ Installation area needs to be free of chemicals and debris.
￭ Installation surface needs to be free of erosion.
￭ Install in an area with open air flow and minimal exposure to weather conditions.
󰏗 WARNING
￭ Owner of the equipment should always emphasize precaution to the operator.
￭ Accidents should be avoided through careful observation of abnormalities such
as irregular noise from the equipment.
￭ Equipment parts should not be altered or relocated in any form.
￭ Failure to use recommended parts may result in accidents.
￭ Do not remove or alter safety stickers or safety valves.
￭ Always examine equipment for missing and irregular parts.
￭ Notify us in the event of any discovery of defects, after posting a sign alerting
the equipment out of order.
￭ Machinery should always be operated in right lighting. Lighting too bright or too
dark may lead to accidents in operating the equipment.
￭ Always check the status of oil and need for changing of oil.
￭ Always check the power supply current for the equipment.

- 4 -
󰏗 DANGER
￭ Do not touch the equipment during operation.
￭ Do not use flammable cleaners during maintenance.
￭ Do not climb the equipment.
￭ Operators should always wear a safety suit, gloves, headwear, and other items
for safety. Jewelry should not be worn during operation.
￭ Equipment should be installed on a level and flat surface.
 SAFETY EQUIPMENT AND INDICATORS
◩ SAFETY EQUIPMENT
￭ Safety Valve ￭ Pressure Switch
￭ Electrical Overload Meter ￭ Pressure Gauge
￭ Pulley Safety Net
￭ water drain
No INDICATOR
1Overheat
2Electrical Shock
3Warning
4Ear Protection Required
5Clear hands from V-belt
6
Refer to manual, oil needed.
7Operation temperature limit.
8Drain
9Horizontal Placed
◩ SAFETY INDICATORS

AIR COMPRESSOR MANUAL
- 5 -
￭ Possible oil/gas mixture release in the event of an oil leak.
￭ Possible electrical shock from water and humidity.
￭ Possible accidents from operating the equipment not in accordance to the instructions.
￭ Possible high decibel noise.
￭ Possible fire hazards in haphazard handling of fuels.
￭ Possible drive belt friction.
￭ Possible erosion near the cooling fan.
￭ Possible injury from a missing valve in the course of compression
1. Safety principles
2. The regulation of safety prior to operation
3. Technical Data
4. Applied model
5. Installation
6. Operation
7. Maintenance
8. Troubleshooting
9. Preventive Maintenance
10. Warranty Policy
 OTHER DANGERS.
◩ TABLE OF CONTENTS
page no.
◩ APPENDIX (PART LIST)
-. PART LIST
-. AIR FLOW DIAGRAM
-. ELECTRIC DIAGRAM

AIR COMPRESSOR MANUAL
- 6 -
1. Safety Principles
1-1 General Notice
￭The user must observe safety principles to prevent accident during operation.
￭The user must pay attention to preventive maintenance table to prevent accident.
￭ Read the operation manual of your compressor and its drive engine carefully.
1-2 Safety Principles
￭This machine is designed and constructed for only breathing air compressor so, user
has not to use for other purposes.
￭Allow only qualified personnel to operate the compressor.
￭ Take care that the intake air is pure and free of toxic gases and exhaust fumes.
￭Machine operation can be stopped by pressing Emergency Stop Switch in dangerous
situations.
￭ Do not place any objects on compressor while in operation.
￭ Make sure no person or object can accidentally touch any moving parts while
running.
￭ All work on compressor must be carried out while compressor is plugged off and
depressurized.
￭ Check regularly for leaks by brushing all fittings and couplings with a soap solution.
￭ Never weld high pressure tubing.
￭ Filling-hoses must be in perfect condition; special attention should be paid to he
connecting fittings
￭ Units installed with electric motor must be disconnected the power-cable prior to
any work.
￭ Make sure no person is within one meter of the drain-hoses before draining the
condensate
￭ Do not touch the exhaust while the engine is running and within ten minutes after
shutting down.
￭ The main power supply must always disconnected after operation.
￭The power transmission belt guards should not be opened except checking
main power supply.
￭ The operator should wear ear protection if exposed to the noise of the running
compressor for the extended periods of time.

AIR COMPRESSOR MANUAL
- 7 -
2. The regulation of safety prior to operation
2-1 Installation of product should be in shade area, well-ventilated and clean area.
2-2 Use proper power to operate the product based on Manufacturer's advisory voltage
and electric current.
2-3 Use standard lubrication oil recommended by the manufacturer and change oil
periodically.
2-4 Do not let strange material taken in the air intake port.
2-5 Manual drain type product should be drained periodically by opening the drain valve
of condensate.
* Auto drain type product designed to drain condensate automatically based on
periodical setting.
2-6 Do not adjust pressure regulator, safety valve and other parts set without
manufacturer's confirmation.
2-7 Use air purification filter recommended by manufacturer.
2-8 Use air intake filter recommended by manufacturer.

AIR COMPRESSOR MANUAL
- 8 -
3. Technical Data
MODEL NO. MSF-390
PISTON DISPLACEMENT (ℓ/min.) 150
DELIVERY RATE (ℓ/min.) 90
OPERATING PRESSURE (㎏/㎠) 330
SAFETY VALVE SETTING PRESSURE (㎏/㎠) 300
PRESSURE SWITCH SETTING PRESSURE (㎏/㎠) 330
SIZE (mm) L800 x W380 x H550
WEIGHT (㎏) 65
COMPRESSOR SPECIFICATION
NUMBER OF STAGES 3
NUMBER OF CYLINDERS 3
CYLINDER BORE 1 STAGE (mm) 65
CYLINDER BORE 2 STAGE (mm) 28
CYLINDER BORE 3 STAGE (mm) 13
PISTON STROKE 26
SPEED (rpm)
220V SINGLE PHASE : 1735
THREE PHASES 220V : 1760
THREE PHASES 440V : 1745
●THREE PHASES(50Hz) :1657
INTERMEDIATE PRESSURE 1 STAGE (㎏/㎠) 7
INTERMEDIATE PRESSURE 2 STAGE (㎏/㎠) 40
COMPRESSOR BLOCK OIL CAPACITY (ℓ) 0.8
AMBIENT TEMPERATURE (℃) 5 45
PERMISSIBLE INCLINATION OF COMPRESSOR (℃) 5
BELT SIZE (inch) A-45
PULLEY SIZE (inch/mm) 7/177
MOTOR SPECIFICATION
SINGLE
PHASE
THREE
PHASE
THREE
PHASE
●
OPERATING VOLTAGE (V) 220 220 440/380
POWER (HP(kW)) 3(2.2) 3(2.2) 3(2.55)
PULLEY SIZE (inch/mm) 3.5/89 3.5/89 3.5/89
SPEED (rpm) 3470 3520 60Hz 3490
50Hz 2900
HERTZ (hz) 60 60 ●60
50 50 50
CURRENT(A) 12.6 8.1 4.3~4.7
㎏/㎠ has ±5% error.

AIR COMPRESSOR MANUAL
- 9 -
4. Applied Model
◩ (Fig_01) MODEL : MSF-390
15
14
13
12
11
16
1718
.1
2
3
4
5
8910
7
6
1 OIL IN-LET 10 DRAIN VALVE (MANUAL)
2 SEPARATOR 11 RUBBER
3 ELECTRIC CONTROL BOX 12 HANDLE
4 PRESSURE GAUGE 13 MOTOR
5 TROLLEY WHEEL 14 DISCHARGE FILTER HOUSING(MP21)
6CONNECTION 15PRESSURE HOSE
7 DISCHARGE VALVE(STOP VALVE) 16 OIL GAUGE
8 OIL OUT-LET 17 SAFETY PULLEY NET
9 3STAGE SAFETY VALVE 18 SUCTION FILTER

AIR COMPRESSOR MANUAL
- 10 -
5. Installation
General Notice
The compressor should be connected to an 16 Ampere plug.
Note: Check direction of rotation immediately after the first start. If the direction of rotation
is wrong, the pistons may adhere to the piston sleeve due to the lack of lubrication!!
Furthermore, the unit would not be cooled properly. When facing the front of he
compressor (water separator side), the direction of rotation should be clockwise (check
arrows on compressor block and cover). Don't place compressor closer than 0.5 m to any
walls and ensure good ventilation.
5-1 Installation area must
￭ be well-ventilated.
￭ keep out of the sun, snow and rain.
￭ have little effect on the weather.
￭ be flat ground.
5-2 Requirements for environmental condition
￭ No erosion.
￭ No the inflammables.
￭ No explosive gas.
￭ Clean area.
￭ No an interference around the Compressor.
￭ Stay away at least 500mm from walls for the COOLING & MAINTENANCE of Compressor.
￭ Install the SUCTION FILTER outside(if possible).
￭ Install the engine ventilation opening and suction filter to be the maximum distance.
6. Operation
6-1 The user position of the Compressor
￭ Be located near the STOP SWITCH of Compressor
6-2 The check condition of a trial run
￭ Check the electric current complied with the electrical specifications of motor.
￭ Check the hindrance around rotating area.
￭ Check the oil capacity.
￭ Check the filter location if it is keep out of the sun, snow and rain or not.
￭ Check the tightness of bolt and the leakage of air
￭ Check the tension of BELT.
￭ Be well acquainted with preventive maintenance check list.

AIR COMPRESSOR MANUAL
- 11 -
FOR 200Kg/㎠ METHOD FOR 300Kg/㎠
CONNECT
DISCHARGE
VALVE AND AIR
TANK
LOCK THE
DISCHARGE
CONNECTION HANDLE
(CW)
OPEN THE
DISCHARGE VALVE
AND
AIR TANK VALVE
(CCW)
6-3 Operating Procedures
Before filling operation is executed, check if:
￭ Tanks are suitable for final pressure.
￭ Hydro static test is done.
￭ The automatic switch-off, or safety valves must be checked
󰏗 WARNING Do not fill the pressure bottle from 200 bar to 300 bar.
Please drain all remain pressure in the machine down to 0 bar.
How To Connect The Injector And Tank
※The disjointing reverse order of assembly

AIR COMPRESSOR MANUAL
- 12 -
Filling process
1. Turn handle to connect the injector and tank
2. Open the INJECTOR by turning the DISCHARGE VALVE
3. Turn the tank valve opens
4. Start compressor by pressing switch
5. When charging is completed, the set pressure stops operation of the electric motor
6. Close the injector by turning the discharge valve
7. Turn the tank valve close
8. Turning the handle to separate the tank from the injector(CCW)
9. When Charging is completed, Drain the oil-water separator condensate remains
Open the drain valve attached to the bottom of the filter housing and the oil-water
separator
󰏗 WARNING In order to prevent freezing in winter condensate
must be removed
DISCHARGE VALVE
CONNECTION
PRESSURE GAUGE
Fig.3 INJECTOR SET
INJECTOR HANDLE

AIR COMPRESSOR MANUAL
- 13 -
7. Maintenance
7-1 Checking Oil Level
￭ Check the Oil status before starting a
machine.
￭ Pour the Oil when it is needed after checking
oil status
◩
OIL TYPE
MSL BREATHING AIR COMPRESSOR OIL
model = 1. MOS100
2. MOS501
7-2 Air Intake Filter
￭ Install the extension hoses from suction filter on
the clean air, if needed.
￭ Air inlet filter only for dust reducing of air.
￭ Filter element should be exchanged periodically or
when needed.
￭ Exchange the ELEMENT when it is impossible to use.
￭ Using the soiled filter is not good for performance,
power consumption and durability.
7-3 Cylinder heads and valves
Inlet and outlet valves of the 1st stage are located under the 1st stage valve cover.
The inlet valve opens of the down-stroke, the outlet one on the up-stroke. To reach the
2nd and 3rd stage valves, it is necessary to remove the cylinder heads first. Then the
valves can be pulled out of their seat and held in a bench-vice with the alloy valve holder
for further dismantling. The valves should be replaced after 1000 working hours due to
normal wear and tear.
7-4 Drain Valve
￭ Drain the condensates by opening the drain valve when filling job is finished
￭ Auto drain valve is automatically opened when the compressor is stopped.
￭ Auto drain valve won't work, on condition of having a some trouble in the
SOLENOID VALVE.
￭ Be required spacial attention in winter.
- Be careful of damaging the COMPRESSOR BODY and LINE by the frozen air line.
- Use the hot stove to melt the frozen DRAIN VALVE.
Fig_2 OIL LEVEL GAUGE
Fig.3 OIL CHANGE
Fig.4 SUCTION FILTER

AIR COMPRESSOR MANUAL
- 14 -
1st Stage 5 kg/cm²
2nd Stage 60 kg/cm²
- Always operate the ELECTRIC HEATER(Option) in wintertime, if needed.
7-5 Pressure Gauge
￭ AIR PRESSURE GAUGE displays the pressure of air serviced and OIL PRESSURE
GAUGE displays LUBRICATION OIL pressure of compressor block.
￭ PRESSURE GAUGE is required of special attention for a shock, not to be broken.
￭ Immediately exchange on condition of being damaged.
￭ Exchange PRESSURE GAUGE according to manufacture's recommendation.
7-6 Safety Valve
Every pressure-stage is equipped with its own safety valve. They protect the unit
from over-pressure or load. The valve are adjusted to:
If a safety valve blows, it indicates problem with either inlet or outlet valve of the
next stage.
Note: A faulty safety valve should be replaced immediately!!
￭ Safety valve protects the machine for the higher pressure than set pressure
￭ Operator should check safety valve condition and operation carefully.
￭ The damaged safety valve should needs proper and prompt care,
if needed, should be immediately exchanged with manufacturer authorization.
￭ Do not change safety valve without manufacture authorization.
￭ Do not modify or adjust Safety valve without manufacturer's authorization.
￭ Only skilled engineer can regulate safety valve's setting pressure with manufacture's
instruction and confirmation.
(Caution : Never exceed over 110% of rated pressure)

AIR COMPRESSOR MANUAL
- 15 -
SAFETY VALVE TYPE-Ⅱ
Pressure Adjustment
1.The valve user shall a specific cracking
pressure of the valve supplied.
To in crease the cracking pressure of the valve,
turn the adjusting cap "CW" to compress the
spring. To reduce the pressure, turn
counterclockwise.
2. Start the compressor with the spring relaxed
(eight threads showing with the Locking Nut at
bottom), with the discharging port open, check
the gauge pressure as you turn the adjusting
cap "CW" to increase the pressure to the
desired operating range.
3. Set the Locking Nut and the wire to maintain
the set cracking pressure.
󰏗 DANGER
Do not modify Set pressure without Manufacturer
Written Authorization.
SAFETY VALVE TYPE-I
￭ Pressure setting to INCREASE.
Turn the ① PRESSURE ADJUST SCREW to "CW"
after loosening the② LOCK NUT.
Turn the ② LOCK NUT to "CW",after setting
the pressure ,watching the Pressure gauge.
￭ Pressure setting to DECREASE.
Turn the ① PRESSURE ADJUST SCREW to"CCW"
after loosening the ② LOCK NUT.
Turn the ② LOCK NUT to"CW" ,after setting
the pressure ,watching the pressure gauge.
Fig.5-1 Safety type-Ⅱ
Fig.5 Safety type-Ⅰ

AIR COMPRESSOR MANUAL
- 16 -
7-7 Other safety Device
￭ PRESSURE SWITCH
Function: Stop running of compressor in case of over pressured situation.
◩ PRESSURE UP : CW (CLOCKWISE)
CW ◩PRESSURE DOWN : CCW (COUNTER CLOCKWISE)
￭ Pressure non-return Valve is integrated
with 4th final oil/water separator.
￭ Pressure Maintaining Valve/non-return valve is installed with Air Purification Chamber.
A pressure maintaining/non-return valve is fitted between water
separator / filter housing and filling valves. it is adjusted to provide a
pressure of at least 120 bar to the filling hose, optimizing the
effectiveness of the filter to ensure the best possible air quality.
7-8 AIR PURIFICATION FILTER
￭ It plays a role for removing the dust, moisture and smell of compressed air and is applied
for cartridge type to change easily. You should replace the air filter every 50 hours to get
a good quality compressed breathing air. If you use the compressor in hot and humid
area or season, change it every 30 operating hours.
￭ Change filter
-Turn the filter housing cap to "CCW" with supplied filter opener and resolve it.
-Take the old filter cartridge out of the housing and insert new cartridge after
cleaning inside of the purification housing with clean and dry rag.
󰏗CAUTION Please Use Only MSL Air Purification Cartridge.
MSL compressor is not responsible for any injury or defects of
p
ersonnel
and product by using unauthorized air purification filters.
- Close the housing cap by carefully turning to "CW" without damaging the o-ring.
☞ You can easily exchange with supplied volt or attached i-volt on the motor in
case of changing filter element.
Fig_6 PRESSURE S/W
Fig.6-1 Non-return Valve
Fig.6-2 Pressure Maintaining Valve / Non-Return Valve

AIR COMPRESSOR MANUAL
- 17 -
FIG.7 Changing Filter
7-9 V-belt tension
￭ Replace the old belts with the new V-belts after the first 25 operating hours.
￭ The best tension for a belt drive is the lowest possible, where the belt under
full load does not slip.
￭ A rough value for this is when the belt deflects 10 ㎜ when pressed with thumb
pressure between the two pulleys.
Fig_08. BELT TENSION
10 mm

AIR COMPRESSOR MANUAL
- 18 -
7-10 Torque sequence
￭ Tighten valve head and cylinder bolts/nuts equally in the sequence shown in
figuration.
Fig._09. TORQUE SEQUENCE
7-11 Tightening torque values
￭ Unless otherwise specified in text, the following torque values apply.
￭ All valve head screws require torque wrench tightening.
￭ The indicated torque values are valid for bolts in greased condition.
￭ Replace self-retaining nuts on reassembly.
BOLT TYPE BOLT SIZE MAX. TORQUE
HEXGON BOLT M6 10 Nm
HEXGON BOLT M8 25 Nm
HEXGON BOLT M10 45 Nm
HEXGON BOLT M12 75 Nm
HEXGON BOLT M14 120 Nm
HEXGON BOLT M16 200 Nm
7-13 Check Points after operation
￭ Open the drain valve after running to drain condensate
￭ Before changing compressor oil, make sure heating the compressor block by running
more than 5 min.

AIR COMPRESSOR MANUAL
- 19 -
7-14 Conservation of compressor
If the compressor will not be used for a long period of time the following steps should
be carried out:
1. Run the compressor for about 10 min.
2. Open filling valves and let the compressor run for another five minutes.
3. Turn the compressor off.
4. Release all remaining pressure and condensate.
5. Close filling valves.
6. Compressor should be stored at the dry and dust free area.
7. Check the compressor periodically with maintenance table for prevent from decreasing
of life time and bad performance.
Before restarting the compressor, the following steps should be carried out:
1. Change compressor oil. (If the compressor was out of use for more than 12
months.)
2. Check air intake filter.
3. Replace Air purification filter.
4. Check the oil level.
5. Check condition of filling hoses.
6. Start compressor.
7. Run compressor with opening the filling valves for 5 min
8. Close filling valves.
9. Drive compressor close to 200 bar and control connections for air leaks.
10. Release pressure and drain water separators.
The compressor is now ready for use.

AIR COMPRESSOR MANUAL
- 20 -
8. Troubleshooting
Problem Cause Action
No Block Pulley Rotation 1.Cylinder and Piston Failure
2.Insufficient Power
* Service to manufacturer
* Check the operating power
Compressor running
Too HOT
1.insufficient supply of fresh cooling air
2.Intake or outlet valves not closing
properly
3.Wrong direction of rotation
4.Intake filter contaminated
* Check location max. ambient Temp. +45℃
* Check and clean valves, replace as necessary
* See arrow on compressor and
remedy accordingly
* Clean or replace intake filter
Fill up time is too long
1.Failure of suction valve
2.Air line leakage
3.Failure of nipple
4.Intake filter contaminated
5.Failure of unload valve
* Change valve
* Change the line with air leakage
* Check the nipple
* Clean and change of intake filter
* Applied lubrication oil
after removement of unload nipple
Abnormal noise
1.Worn down
2.Shortage of oil
3.Obstructed intake filter
* Change parts
* Supply oil
* Check intake filter
No rotation of MOTOR
1.A stoppage of electric current.
2.A break in a wire
3.Failure of motor starter
4.Bad connecting
* Check the incoming wire connection
* Check wire disconnection
* Check the contact point
* Fasten the terminal screw
* Check switch
Overheated motor
1.Overload
2.Fluctuation of Suppling Voltage
and Frequency
3.Over voltage and voltage dips
4.Bad cooling
* Check the rated current
* Check the voltage and frequency
* Clean the cooling area
Reverse rotation of
motor 1.Main power supply connection error * Check the 3 phase sequence
Can not start Engine
(In case of using engine
instead of motor)
1.Discharged battery
2.Bad contact of electric equipment
3.Failure of start motor
4.Bad connection
5.Failure of generator
* Fasten terminal screw fully
* Check switch function
* Check power cable
* Change generator
* Refer to the engine manual
Electrical error
1.Unexpected protective
function(Turn-off)
of NFB
2.Malfunctioning of Pressure switch
* Check short-circuit
* Overload(Rating and setting of overcorrect
protective devices)
* Check power wire
* Check air line
* Check selected Pressure
* Change PRESSURE SWITCH
Failure of
Auto drain valve
1.Malfunctioning of sol-valve
2.Malfunctioning of automatic drain valve
* Change SOLENOID VALVE
* Check the air line and piping and clean.
* Check the line in the wintertime against
rupture by freezing
* Check the wiring
* Check and Clean up exterior and interior
* In the wintertime, obstructed air line by freezing
(Melt by Hot air gun)
* Check air line
Failure of safety valve 1.Air Line Contaminated by Obstruct * Clean up Obstruct
* Change safety valve
AIR condensation
time is too long
1. Check the air line leakage
(Verify the air line leakage under main power
off after rise up air line pressure at 150 ㎏/㎠)
2. Check the air leak about drain during operating
condition
If there is air leakage, change SOLENOID
VALVE
3. Check the third and fourth step head and pipe
NIPPLE