![background image](http://html.mh-extra.com/html/gmc/gphc21/gphc21_original-instructions-manual_2235774013.webp)
GB
13
Problem
Possible cause
Solution
No function when Trigger (11) is operated
No power
Check power supply
Defective Trigger
Replace the On/Off Trigger Switch at an authorised GMC service
centre
Intermittent power cut-out
Replace the On/Off Trigger Switch at an authorised GMC service
centre
Gradual power loss, intermittent cut-out
Worn/ faulty motor brushes
Replace using supplied spare brush set (see ‘Brushes’), or return to
an authorised GMC service centre
Chainsaw does not cut effectively, and produces fine saw dust
Saw Chain (18) blunt
Sharpen or replace the Saw Chain
Chain oil tank empty
Refill chain oil
Chain oil delivery too low
Ensure chain oil path is not blocked with debris and clear debris
Chain tensioned incorrectly set
Correct chain tension in ‘Tensioning the chain’
Hedge trimmer does not operate
Power is off
Switch power on
Mains socket faulty
Use another socket
Extension cable damaged
Inspect cable, replace if damaged
Fuse faulty/blown
Replace fuse
Hedge trimmer operates intermittently
Extension cable damaged
Have the hedge trimmer serviced by an authorised GMC service
centre
Internal wiring damaged
Have the hedge trimmer serviced by an authorised GMC service
centre
One or both switches defective
Have the brushes replaced by an authorised GMC service centre
Carbon brushes worn
Motor operates but blades remain stationary
Internal fault
Have the hedge trimmer serviced by an authorised GMC service
centre
Blade becomes hot during use
Blade blunt
Sharpen blade or return hedge trimmer to an authorised GMC
service centre for blade replacement
Blade damage
Return the hedge trimmer to an authorised GMC service centre for
blade replacement
Too much friction
Apply lubricant
Excessive vibrations or noise
Internal fault
Have the hedge trimmer serviced by an authorised GMC service
centre
If the above troubleshooting solutions fail, contact your dealer or an authorised GMC service centre.
Troubleshooting
515017_Z1MANPRO1.indd 13
10/12/2014 14:37