12
7-2.14 F5a, F5E, F5F
F5a : Battery current is more than 3.8A
F5E : Measured charging current more than 50% larger than the specified value has continued for 10 s
F5F : Measured charging current less than 30% than the specified value has continued for 10 s
Confirm the function of battery charging referring to Appendix C.6 of Installation Manual.
The waveform of measured charging current can be confirmed at the following check pins.
CP5(IC) on MUX POWER-04B PCB
→CP9(IC1) on MUX POWER-04A PCB
→CP22(IC) on XCONT-2002 PCB (→NEXSC PCB)
If one of them is normal, it means that battery charging itself is performed correctly ,but one part of
detection circuit for charging current is not working well.
For example, if the waveform at all of three check pins are normal, detection circuit on XCONT PCB is
maybe not working correctly.
If the waveform at CP5(IC) on MUX POWER-04B PCB is abnormal, check the following before the
error happens.
1. Input power supply AC125V to MUX CHARGE-04B from T1 transformer including the fuse F13
2. Fuse F1 on MUX POWER-04B PCB
3. Gate waveform for inverter at CP3(Q14C) ,CP4(Q23C) on MUX POWER-04B PCB
4. Gate waveform for inverter at CP20(Q14C) ,CP22(Q23C) on MUX POWER-04B PCB
5. CHON (Charging ON signal) on MUX POWER-04A PCB (The green LED LD1 should light on.)
6. CP25(PIC) signal :Setting value for charging current from CPU
If you cannot specify the defective part with above checking, replace the following parts as turn.
1. Battery
2. MUX POWER-04A PCB
3. MUX POWER-04B PCB
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