Mitsubishi FB13PNT, Quick Start Manual

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2-121 2-121
Power card Power card
g g
501157 501157
CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS CHAPTER 2 TROUBLESHOOTING FOR CONTROL CIRCUITS
3. 3.54 54 Lo Load ad Se Sens nsor or Fa Faul ult t (8 (81) 1)
Error code: 81 Error code: 81
Situation Situation
Pitch control and tilt mechanism to secure horizontal operation are disabled. Pitch control and tilt mechanism to secure horizontal operation are disabled.
All other operations are available.
All other operations are available.
Possible Possible
cause
cause
Load weight sensor fault, harness fault, logic unit Load weight sensor fault, harness fault, logic unit fault fault
Trigger of Trigger of
the error the error
code
code
Load weight sensoris more than 4.9 V, or less than 01 V. Load weight sensoris more than 4.9 V, or less than 01 V.
Checks Checks
(1) Disconnect battery plug (1) Disconnect battery plug
(5) Replace harness (5) Replace harness
(4) Connect logic connector E-02 and E-03 and connect (4) Connect logic connector E-02 and E-03 and connect
battery plug battery plug
Turn on power Turn on power
Check Check voltage between voltage between E-20-3(Power) E-20-3(Power) and and
E-20-1(GND) E-20-1(GND)
5 5 V V ± ± 10 10 % % Out Out side side acce acce pta pta ble ble range range
(2) Disconnect cable of logic and load weight sensor (2) Disconnect cable of logic and load weight sensor
Chec Chec k continuity between E-02-24 k continuity between E-02-24 and E-20- and E-20- 3(55) 3(55)
Chec Chec k continuity between E-02-23 k continuity between E-02-23 and E-20- and E-20- 1(54) 1(54)
Chec Chec k continuity between E-03-28 k continuity between E-03-28 and E-20- and E-20- 2(56) 2(56)
Continuity Continuity No No continuity continuity
(6) Turn off power, turn off battery and discharge (6) Turn off power, turn off battery and discharge
Replace load weight sensor Replace load weight sensor
(8) Reinstall the load weight sensor just has been replaced (8) Reinstall the load weight sensor just has been replaced
and replace logic card of logic unit and replace logic card of logic unit
If fault remains If fault remains
(7) Replace logic card of logic unit (7) Replace logic card of logic unit
(3) Disconnect connecter E-01 (3) Disconnect connecter E-01
Chec Chec k continuity betw k continuity betw een E een E -02-04 -02-04 and and E-0 E-0 1-09 1-09
N N o o r r m m a a l l A A b b n n o o r r m m a a l l