Troubleshooting Guide; Troubleshooting Codes - Craftsman CMCC2520 Nstruction Manual

English
This section provides a list of the more frequently encountered malfunctions, their causes and corrective actions. The
operator or maintenance personnel can perform some corrective actions, and others may require the assistance of a
qualified CRAFTSMAN technician or your dealer.
Code Possible Cause
Pressure switch does not shut off
motor when compressor reaches cut-
1
out pressure
2 Pressure switch cut-out too high
Tube fittings are not tight enough
3
Defective air tank
4
Leaking seals
5
Defective safety valve
6
Regulator is not adjusted correctly for
accessory being used
7
8 Prolonged excessive use of air
Compressor is not large enough for
9
accessory
11 Check valve restricted
12 Air leaks
Regulator is damaged
13
Motor overload protection switch has
14 tripped
Tank pressure exceeds pressure switch
15
cut-in pressure
Loose electrical connections
16
Possible defective motor
17
Paint spray on internal motor parts
18
Pump does not run because tank
19
pressure is above cut-in pressure.
Pump does not run due to safety fault.
20

Troubleshooting Codes

Problem
Excessive air tank pressure-safety valve pops off
Air leaks
Air leaks in air tank or at air tank welds
Air leaks between head and valve plate
Air leaks from safety valve
Compressor is not supplying enough air to operate accessories
Regulator dial has continuous air leak
Regulator will not shut off air outlet
Motor will not run
12

Troubleshooting Guide

Set the Auto On/Off switch to "Off" and remove the batttery, if the unit does not shut off contact a
CRAFTSMAN factory service center or a CRAFTSMAN authorized service center.
Contact a CRAFTSMAN factory service center or a CRAFTSMAN authorized service center.
Tighten fittings where air can be heard escaping. Check fittings with soapy water solution. Do
Not Overtighten.
Air tank must be replaced. Do not repair the leak.

WARNING: Risk of bursting. Do not drill into, weld or otherwise modify
air tank or it will weaken. The air tank can rupture or explode.
Contact a CRAFTSMAN factory service center or a CRAFTSMAN authorized service center.
Operate safety valve manually by pulling on ring. If valve still leaks, it must be replaced.
It is normal for some pressure drop to occur when an accessory is used, adjust the regulator as
instructed in One-turn Regulator under Description of Operations if pressure drop is excessive.
nOTE: Adjust the regulated pressure under flow conditions while accessory is being used.
Decrease amount of air usage.
Check the accessory air requirement. If it is higher than the CFM or pressure supplied by your air
compressor, a larger compressor is needed to operate accessory.
Contact a CRAFTSMAN factory service center or a CRAFTSMAN authorized service center.
Tighten fittings.
Replace.
Refer to Motor Overload Protector under Description of Operations. If motor overload protection
trips frequently, contact a CRAFTSMAN factory service center or a CRAFTSMAN authorized
service center.
Motor will start automatically when tank pressure drops below cut-in pressure of pressure switch.
Contact a CRAFTSMAN factory service center or a CRAFTSMAN authorized service center.
Contact a CRAFTSMAN factory service center or a CRAFTSMAN authorized service center.
Contact a CRAFTSMAN factory service center or a CRAFTSMAN authorized service center. Do not
operate the compressor in the paint spray area. See flammable vapor warning.
Drain tank to below cut-in pressure when pump turns on.
Cycle Auto On/Off Switch from "Off" to "Auto On."
Possible solution
Code
1, 2
3
4
5
6
7, 8, 9, 10, 11, 12
13
13
6, 14, 15, 16, 17, 18, 19, 20