Troubleshooting Guide - Ingersoll Rand ESCB20 Manual De Instrucciones

TROUBLE
Screwdriver does not rotate
Pilot Lamp (2H) does not light.
Screwdriver will not rotate when
Forward/Reverse Switch (2D) is
in Reverse position.
Screwdriver will not rotate when
Forward/Reverse Switch (2D) is
in Forward position.
Faulty auto cycle

TROUBLESHOOTING GUIDE

PROBABLE CAUSE
Blown Fuse (7B)
Defective Fuse Holder Assembly
(7A)
Defective Cord Assembly (8)
Defective Power Switch (2B)
Defective Transformer (4)
Defective wiring between Trans-
former and Control Base (2E)
No power from Control Base
Defective Pilot Lamp
Defective Control Base
Defective Control Base
Defective Auto Switch
SOLUTION
Replace Fuse.
Use voltmeter set at 0–250 volts AC to check
voltage at T3 and F2. Reading should be 115 volts
AC. If no reading, replace Fuse Holder Assembly.
Use Voltmeter set at 0–250 volts AC to check
voltage at T3 and C1. Reading should be 115 volts
AC. If no reading, replace Cord Assembly.
Use voltmeter set at 0–25 volts AC to check voltage
at T3 and F1. Reading should be 115 volts AC.
Turn Switch on and off. If no reading, replace the
Power Switch.
Use voltmeter set at 0–50 volts AC to check voltage
at T4 and T5. Reading should be 24 volts AC. If
no reading, replace Transformer.
Use voltmeter set at 0–50 volts AC at 3 and 4.
Reading should be 24 volts AC. If no reading,
repair wiring.
Use voltmeter set at 0–2.5 volts DC to check volt-
age at 5 and 6. Reading should be 1.75 volts DC.
If no reading, replace Control Base.
Repeat above procedure. If there is reading of 1.75
volts DC and Lamp does not light, replace Lamp.
With Forward/Reverse Switch in Reverse position,
use voltmeter set at 0–50 volts DC at 7 and 8.
Reading should be 22 volts DC. If no reading,
replace Control Base. With Switch in Forward
position, reading should be 0.
With Forward/Reverse Switch in Forward position,
use voltmeter set at 0–50 volts DC at 7 and 9.
Reading should be 22 volts DC. If no reading,
replace Control Base. With Switch in Reverse
position, reading should be 0.
Replace Control Base.