Fuji Electric FRENIC MEGA G2 Series - Page 644

6.4 If a Warning Code is Displayed
6-30
[ 4 ] OH Cooling fin overheat early warning
Possible cause
Check and measures
(1) Cooling fin overheat early
warning
This is displayed as a warning before cooling fin overheating trip 0H1
occurs.
Refer to “[ 30 ] 0H1 Cooling fin overheat” for details on
countermeasures.
[ 5 ] Ol Motor overload early warning
Possible cause
Check and measures
(1) Motor overload early warning
This is displayed as a warning before the motor overload 0l1 alarm
occurs. Set the current at which this is triggered at overload warning
operation level (E34).
Check whether the actual motor current is greater than the current set at
E34.
[ 6 ] pid PID alarm output
Possible cause
Check and measures
(1) PID alarm output
This is displayed if a PID control warning (absolute value warning,
deviation warning) occurs. Refer to Chapter 5 "FUNCTION CODES " -
"5.3.8 J Codes (Applied functions)" (J11 to J13 PID Control (Select
warning output)).
[ 7 ] pTC PTC thermistor activated
Possible cause
Check and measures
(1) Thermistor detection (PTC)
This warning is displayed when the temperature detected with the motor
PTC thermistor exceeds the operation level (H27) threshold value. Refer
to "[ 33 ] 0H4 Motor protection (PTC thermistor)” for details on
countermeasures.
[ 8 ] rAf Cooling capability drop
Possible cause
Check and measures
(1) Cooling capability drop
Drops in cooling capability due to the clogging of cooling fins with dust,
etc., or drops in cooling fan air flow are detected and displayed.
Clean the cooling fins or replace the cooling fan as necessary.
Depending on the usage conditions, cooling fin overheating protection OH1 may occur first. By using
cooling fin overheating early warning OH, an overheating early warning can be detected before cooling
fin overheating protection OH1 occurs.
[ 9 ] ref Reference loss
Possible cause
Check and measures
(1) Command loss
If the analog frequency setting (terminals [12], [C1], [V2]) command
drops rapidly to 10% or lower, a wire break is determined, and “ref” is
displayed. Check the wiring.
[ 10 ] rTe Machine life (Cumulative motor running hours)
Possible cause
Check and measures
(1) Inverter life (Cumulative run
time)
This is displayed when the motor cumulative running time reaches the
time set with function code H78 (maintenance setting time). The motor
cumulative running time can be checked at H94* (motor cumulative
running time). Furthermore, the time can be reset by setting the H94*
value to “0”.