
2. ALARM NUMBERS AND
B-65165E/02 TROUBLESHOOTING BRIEF DESCRIPTIONS
- 105 -
2.3 FOR SERIES 16, 18, 20, 21
Servo alarm
Alarm
No.
Diagnosis
screen
SVM SPM PSM Description Remarks
350 Alarm 3 α pulse coder error alarm 3.3.7
351 Alarm 4 Pulse coder communication error alarm 3.3.7
400 OVL 1
2
3
Fan stopped alarm (SVM)
Fan stopped alarm (PSM)
Overheat alarm (PSM)
Overheat alarm (motor)
3.2
3.1
3.3.5
HVA 7 DC link overvoltage alarm 3.1
8
9
A
b
C
d
E
1
Abnormal current alarm (L axis)
(M axis)
(N axis)
(L, M axis)
(M, N axis)
(L, N axis)
(L, M, N axis)
(PSM overcurrent + IPM alarm)
3.2
3.1
HCA
8.
9.
A.
b.
C.
d.
E.
IPM alarm (L axis)
(M axis)
(N axis)
(L, M axis)
(M, N axis)
(L, N axis)
(L, M, N axis)
3.2
OVC Soft thermal (OVC) 3.3.3
LVA 2
5
4
6
Control power supply undervoltage
alarm
DC link undervoltage alarm (SVM)
DC link undervoltage alarm (PSM)
Power supply state alarm
3.2
3.1
FAN 1
2
Fan stopped alarm (Series 20 only)
Fan stopped alarm (Series 20 only)
3.2
3.1
MCC 5 MCC fused, precharge alarm 3.1
414
OFS Current conversion error alarm 3.3.8
416 FBA Feedback disconnected alarm 3.3.4
417 PRM Invalid servo parameter setting alarm 3.3.6
For the correspondence between the diagnosis screen
numbers and names, see the table below.