14
TROUBLE SHOOTING CHART FOR COMPRESSOR
Always disconnect unit from power supply and relieve all pressure from air tank before
performing any maintenance. Failure to do so may result in equipment damage or injury.
A
Lock Out" or "Tag Out" all power sources.
WARNING
Never operate unit without belt guard in place.
Never use gasoline or flammable solvent on or around compressor unit. Explosion may
result.
SERVICE PROBLEM
A
Motor will not Start
B
Motor is Noisy or Overheats
C
Motor Stops
D
Compressor Runs Hot
E
Compressor Pumps Too Slowly
F
Compressor Won't Shut Off
G
Noisy Check Valve
H
Excessive Belt Wear
I
Abnormal Pressure Fluctuation
J
Air Escapes From Unloader Muffler When Running
K
Air Escapes From Unloader Muffler When Stopped
L
Interstage Pressure Relief Valve Pops Off Continuously
M
Compressor Cycles (runs) too Often
N
Starter Kicks Out
POSSIBLE CAUSE OF PROBLEM
N
M
L
K
J
I
H
G
F
E
D
C
B
A
1
Main Switch and Fuses Open
1
2
Magnetic Starter Heater Coils Open
2
3
Magnetic Starter Tripped
3
4
Points in Pressure Switch Defective
4
5
Diaphragm in Pressure Switch Bad
5
6
Low Voltage
6
7
Motor Lubrication Inadequate
7
8
Excess Water in Air Receiver
8
9
Dirty Aftercooler; Cylinder and Intercooler
9
10
"V" Belts Improperly Tensioned
10
11
Improper Flywheel Rotation
11
12
Compressor Pump Valves Defective
12
13
Pipe Line Leaks
13
14
Misadjustment of Pilot Valve -
This is for
optional parts.
14
15
Pilot Valve Leaks -
This is for optional parts.
15
16
Centrifugal Unloader Valve is Leaking
16
17
Check Valve is Leaking
17
18
Check Valve is Worn
18
19
Check Valve or Line to Tank is Plugged
19
20
Misaligned Belts
20
21
Dirty Intake Filter
21
22
Low Crankcase Oil Level
22
FOR EXPLANATION SEE NEXT PAGE
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Summary of Contents for HR3-6
Page 25: ...25 UNIT HAZARD DECALS TAGS A B C D E F G H I J ...
Page 26: ...26 K L M N O P Q R S T U V W 140 175 PSIG ...
Page 27: ...27 PUMP HAZARD DECALS TAGS 1 2 3 4 5 6 ...
Page 31: ......