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PH20 troubleshooting
For detailed troubleshooting of the PH20 system please refer to the CMM support knowledgebase (www.renishaw.com/cmmsupport) or contact your local Renishaw office.
PH20 system status indicator LEDs
The head incorporates two LEDs for status indication in various modes, located as illustrated below.
![PH20 head LEDs](/cmmsupport/knowledgebase/media/img/gen/6321e2dda5a347788f3d443f7c17fcf8.jpg)
LED | Servo LED | Probe LED |
---|---|---|
Off | No power (probe LED also off) | Probe triggered or module removed |
Green | Servos on | Probe seated |
Red | Servos off | Probe inhibited |
Flashing red | Power, no comms | n/a |
Amber | 'Soft engage' mode* | n/a |
* The ‘Soft engage' is a fault condition where the PH20 head uses a weak motor drive and can be manually rotated to prevent damage.
Head comms signal booster box indicator LEDs
![PH20 booster box LED labels](/cmmsupport/knowledgebase/media/img/gen/5bece20816e24371840da486d5a5badd.jpg)
There are three LEDs on the head comms signal booster box that can be used for basic fault indication.
LED | POWER | FROM UCC | FROM HEAD |
---|---|---|---|
Off | No system power | No comms from UCC | No comms from head and / or UCC or downloadable isn't running |
Green | Normal operation | n/a | n/a |
Flashing green | n/a | Comms OK from UCC | Comms OK from head |
Flashing red | n/a | Comms error from UCC - check cable to UCC | Comms error from head - check cable to head |