Mitsubishi FB13PNT, Quick Start Manual

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2-113 2-113
502542 502542
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.50 50 Ba Batt tter ery V y Vol olta tage T ge Too L oo Low ( ow (78 78))
Error code: 78 Error code: 78
Sit Situat uation ion Dis Displa play: "7 y: "78". 8". All t All truc ruck ope k operat ration ions inh s inhibi ibited ted. Li . Line c ne cont ontact actor O or OPEN PEN and p and pum ump con p contac tactor tor OPE OPEN. N.
Possible Possible
cause
cause
Faulty or discharged battery, low voltage battery, improper battery voltage setting (Setup Option #41), Faulty or discharged battery, low voltage battery, improper battery voltage setting (Setup Option #41),
improper battery voltage adjustmen
improper battery voltage adjustment setting (Setup Option #46), faulty t setting (Setup Option #46), faulty main harness, faulty logic unit. main harness, faulty logic unit.
Trigger of Trigger of
the error the error
code
code
Corrected batter Corrected battery voltage is too y voltage is too low. Battery voltage is corrected by #46 low. Battery voltage is corrected by #46 value. value.
36 36 V V battery: battery: less less than than 30 30 V V 48 48 V V battery: battery: less less than than 42 42 V V
Checks Checks
(1) Disconnect battery plug (1) Disconnect battery plug
Measur Measur e battery voltage with m e battery voltage with m ultimeter ultimeter
36 36 V V battery: battery: 34 34 to to 42 42 V, V, 48 48 V V battery: battery: 45 45 to to 60 60 V V Abnormal Abnormal
(3) Charge battery or replace with proper battery (3) Charge battery or replace with proper battery (2) Turn on power in Setup Option Group 3 setting (2) Turn on power in Setup Option Group 3 setting
(4) Set #46 of Setup Option Group 3 (4) Set #46 of Setup Option Group 3
(5) Turn off power and turn on power again (5) Turn off power and turn on power again
(6) Disconnect battery plug, then perform inverter (6) Disconnect battery plug, then perform inverter
discharging work discharging work
(7) Disconnect connector E-01 (7) Disconnect connector E-01
Check Check continuit continuit y y between between E-02-19(105) E-02-19(105) and E and E -01-14 -01-14
Continuity Continuity No No continuity continuity
(8) Perform inverter discharging work, then replace logic (8) Perform inverter discharging work, then replace logic
card of logic unit card of logic unit
(9) Repair or replace main harness (9) Repair or replace main harness
If fault remains If fault remains