Planmeca Compact I - MAIN CPU Related Error Messages; Backrest Motor or Its Position Pot Cable Has a Wrong Connection; RAM Error; Error in Communicating with External Serial Device

Chapter D - HELP & ERROR MESSAGES
Planmeca Compact i D-21
DETAILED DESCRIPTION OF ERROR MESSAGES
Technical Manual
E 69 Backrest motor or its position pot cable has a wrong
connection
Please refer to the explanation for the lift motor (ER66), since both motor systems are equal.
E 70, 71 reserved
3.11 MAIN CPU related error messages
E 72.n Software chip (Flash-EPROM) error
In either case it is highly recommended to immediately replace the Flash-EPROM in the
socket IC2 on the MCB.
E 72.1 Program (Flash-EPROM) error. Main software is corrupted. Replace
Flash- EPROM.
E 72.2 Program (Flash-EPROM) error. Boot software is corrupted. Replace
Flash- EPROM.
E 73.n EEPROM problems
In most cases the CPU chip in socket IC3 should be immediately replaced.
E 73.1 EEPROM error, CPU EEPROM erase/program failure, replace CPU
E 73.2 CPU configuration register contents are wrong, replace CPU
E 73.3 CPU EEPROM checksum error
E 73.4 CPU EEPROM checksum programmed. Replace CPU if error occurs often.
E 74.n RAM problem
If these errors appear repeatedly, please replace the whole MCB.
E 74.1 RAM error, External RAM test failure, replace RAM
E 74.2 CPU RAM test failure, replace CPU
E 75.n Program structure error
These errors do not necessarily indicate a hardware error.
E 75.1 CPU error, Watchdog reset
E 75.2 Illegal OP-code
E 75.3 Illegal vector
E 75.6 Mains voltage failure
E 75.7 Clock monitor reset
E 76 reserved
E 77 Error in communicating with external device
reserved for future use