Planmeca Compact I Technical Manual page 93

DETAILED DESCRIPTION OF ERROR MESSAGES
E 33.n IMUX output short circuit
E 34.n IMUX output open circuit
E 35.n IMUX pressure sensor offset error (too low output)
Technical Manual
All valve outputs on the IMUX are short-circuit protected and can withstand short circuits.
Additionally, the IMUX CPU is able to read the level on the output pins. Therefore the follow-
ing detailed information can be presented about possible short circuits.
E 33.1 Syringe select valve (lifetimes) short circuit
E 33.2 Instrument 1 select valve short circuit
E 33.3 Instrument 2 select valve short circuit
E 33.4 Instrument 3 select valve short circuit
E 33.5 Instrument 4 select valve short circuit
E 33.6 reserved
E 33.7 Drive/Cooling air valve short circuit
E 33.8 Air coolant valve short circuit
E 33.9 Water coolant valve short circuit
These errors can only be detected when the circuit is active.
Disconnect the valve indicated and check if the error disappears. Otherwise the problem must
be in the valve or its cable, or as the last possibility, on the IMUX. If the error does not disap-
pear even if the valve connector is disconnected, then the IMUX must be replaced.
The following list indicates which output is causing the trouble;
E 34.1 Syringe select valve open circuit
E 34.2 Instrument 1 select valve open circuit
E 34.3 Instrument 2 select valve open circuit
E 34.4 Instrument 3 select valve open circuit
E 34.5 Instrument 4 select valve open circuit
E 34.6 reserved
E 34.7 Drive/Cooling air valve open circuit
E 34.8 Air coolant valve circuit
E 34.9 Water coolant valve circuit
These errors can be detected when the circuit is dead.
Disconnect the connector of the indicated bad valve (load) from the IMUX. Measure with an
ohmmeter that the valve coil resistance is in the range 50-300Ω. Check the crimping on the
connector pins for a bad contact.
Check that the indicated pressure sensor pins are properly inserted in the mating sockets on
the PSB. Since the pins are fragile, check also that they are not bent or broken. Check the
condition of the ribbon cable between the IMUX and PSB. Check that it is not pinched
between the IMUX and the console aluminium bottom. Check with another "known to be
good" PSB with sensors attached. Replace the IMUX if the error still is there. Check that the
orientation (only if you have disassembled the sensor block) of the sensor s is OK. The sen-
sor amplifier outputs can easily be measured at the respective test points on the IMUX.
E 35.1 Drive/Cooling air pressure sensor output <0.2V
E 35.2 Air coolant pressure sensor output <0.2V
E 35.3 Water coolant pressure sensor output <0.2V
E 35.4 Differential pressure sensor output <0.2V
Chapter D - HELP & ERROR MESSAGES
Planmeca Compact i D-15