14
Scroll Enclosure Air Compressors
Troubleshooting Guide
Items marked by ▲ are diffi cult for you to remedy. Please contact our distributor.
Problems Possible Cause(s) Corrective Action
Compressor does not operate
No display on the
operating panel
• Electric source is not turned on
• Fuse on the circuit board was blown
• Electric source is not correctly connected
• Failure of circuit board
• Turn on electric source
• Replace
• Connect correctly
• Inspect, repair or replace ▲
It does not operate
despite displays
• Failure or wiring failure of magnetic starter
• Circuit board failure
• Motor failure
• Low voltage
• Inspect, repair or replace ▲
• Inspect, repair or replace ▲
• Inspect, repair or replace ▲
• Check electric source capacity and the size of
electric source cable and change to proper one
E60, E61 or E63 are
displayed
• Communication failure of circuit board
between operating panel and each Unit
operating panel
• Inspect wiring around communications circuit
board
• Replace circuit board
E91 or E92 are
displayed
• Scheduled maintenance time has elapsed • After maintenance, push reset switch to cancel ▲
Err is displayed
• Failure of circuit board • Disengage and reengage the circuit breaker
• Replace circuit board*
It starts but then stops
E21 or E22 are
displayed
• High ambient temperature or bad
ventilation
• Clogging of aftercooler fi ns or intake wire
screen
• Failure of ventilating fan
• Damage to intake hose
• Cooling passage of air end clogs
• High exhaust pressure
• Improve installation environment and ventilation
• Clean
• Replace
• Replace
• Inspect
• Inspect
E32 is displayed
• Low voltage
• Motor failure
• Air end failure
• Loosened wiring screw
• High exhaust pressure
• Failure of thermal overload
• Check electric source capacity, size of electric source
cable and change to proper on
• Inspect, repair or replace ▲
• Inspect, repair or replace ▲
• Tighten
• Readjust
• Replace ▲
E41 is displayed
• High exhaust pressure
• Failure of pressure sensor
• Check pressure
• Replace pressure sensor
Exhaust pressure does
not increase.
• Air leaks from exhaust piping
• Air-end rotates backward
• Wrong pressure setting
• Clogged intake fi lter
• Inspect, repair
• Change phases
• Readjust ▲
• clean or replace
Safety valve activates.
• Failure of safety valve
• Failure of pressure setting
• Replace ▲
• Readjust ▲
Abnormal sound
• Air-end rotates backward
• Air end failure
• Belt slips
• Motor failure
• Cooling fan contacted
• Loosened bolts
• Change phases
• Inspect, repair or replace ▲
• Check tension and readjust
• Inspect, repair or replace ▲
• Inspect and repair
• Inspect and tighten
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