This section describes the alarms and symptoms generated and actions required when the fuses installed on the printed circuit boards and units have blown.
(1) When the fuses of the power supply unit have blown F1: Fuse for AC input (A60L-0001-0450#8R0) F3: Fuse for +24 E (A60L-0001-0046#7.5) F4: Fuse for +24 V (A60L-0001-0046#7.5)
Name Symptom observed when fuse has blown Action F1 The LED (PIL: Green) of the power supply unit
does not light, and the power cannot be turned on.
1 Check the units (fans), printed-circuit board and cables connected to the CP2 and CP3
connectors of the power supply unit to see if there is any short circuit.
2 Replace the power supply unit.
F3 The teach pendant displays “SRVO-217 E-STOP Board not found” or “PRIO-091 E-Stop PCB comm. Error ”
1 Check the printed circuit boards, units, and cables using +24 E according to the power supply system diagram. Replace a faulty printed circuit board, unit or cable if any.
2 Replace the power supply unit.
F4 The power, when turned on, is immediately turned off. At this time, the LED (ALM: Red) lights.
1 Check the printed circuit boards, units, servo amplifier and cables using +24 V according to the power supply system diagram. Replace a faulty printed circuit board, unit, servo amplifier or cable if any. The LED of ALM is turned off by pressing the OFF button once.
2 Replace the power supply unit.
Servo amplifier
F3(7.5A): Fuse for +24E F4（7.5A）: Fuse for +24V PIL: LED (green) F1(8.0A): Fuse for AC input
ALM: LED (red)
Fig.3.6(a) Fuse on the Power supply unit
(2) Servo amplifier fuse
FS1: For generation of the power to the amplifier control circuit (A60L-0001-0290#LM32C) FS2: For protection of the 24V output to the end effector, XROT, and XHBK
(A60L-0001-0290#LM32C) FS3: For protection of the 24V output to the regenerative resister (A60L-0001-0290#LM32C)
Name Symptom observed when fuse has blown
Action
FS1 All LEDs on the servo amplifier go out.
The FSSB disconnection or initialization alarm is displayed on the teach pendant.
Replace the servo amplifier.
FS2 The 6ch amplifier fuse blown (SRVO-214), Hand broken (SRVO-006), and Robot overtravel (SRVO-005) are displayed on the teach pendant.
1 Check +24VF used by the end effector for a ground fault.
2 Check the robot connection cable and the robot’s internal cable.
3 Replace the servo amplifier.
4 In case of M-3iA, check the fan motor inside the robot (option).
FS3 The 6ch amplifier fuse blown (SRVO-214), DCAL alarm (SRVO-043) are displayed on the teach pendant.
1 Check the regenerative resister, and replace it if required.
2 Replace the servo amplifier.
FS1 (3.2A) FS3 (3.2A) FS2 (3.2A)
(3) Emergency stop board fuses
FUSE1: For internal power supply circuit (A60L-0001-0290#LM10C) FUSE2: For +24EXT line (emergency stop line) protection (A60L-0001-0290#LM10C) FUSE3: For teach pendant power supply circuit (A60L-0001-0290#LM10C) FUSE4: For SFDI protection (B-cabinet only) (A60L-0001-0290#LM10C)
Name Symptom observed when fuse has blown Action FUSE1 The teach pendant displays “SRVO-217
E-STOP Board not found” or “PRIO-091 E-Stop PCB comm. Error ”.
1 Check the cable between emergency stop board and main board. Replace them if necessary.
2 Replace the E-STOP unit.
Before executing the (Action 3), perform a complete controller back-up to save all your programs and settings.
3 Replace the main board.
FUSE2 The teach pendant displays “SRVO-213 E-STOP Board FUSE2 blown”
1 If an alarm is issued when the fuse has not blown, check the voltages of EXT24V and EXT0V (TBOP14 for A-cabinet or TBOP10 for B-cabinet). If EXT24V or INT0V is not used, check the jumper pin between EXT24V and INT24V or between EXT0V and INT0V.
2 If the FENCE, SVOFF, and EXEMG are used, these signals may be connected to 0V or ground. Check these cables.
3 Replace the operator’s panel cable(CRT27).
4 Replace the emergency stop board.
5 Replace the teach pendant cable.
6 Replace the teach pendant.
FUSE3 The display on the teach pendant disappears. 1 Check the teach pendant cable for a fault, and replace it if required.
2 Check the teach pendant for a fault, and replace it if required.
3 Replace the emergency stop board.
FUSE4 (B-cabinet only)
The teach pendant displays “SRVO-348 DCS MCC OFF Alarm”
1 Check the SFDI cable connections, and replace it if required.
2 Check the operator’s panel cable (CRT27), and replace it if required.
3 Replace the E-STOP unit.
FUSE1
FUSE2 FUSE3
FUSE1 FUSE2 FUSE3 FUSE4
(A-cabinet) (B-cabinet)
Fig.3.6 (c) Fuse on the Emergency stop board
(4) Fuse on the process I/O board JA,JB
FUSE1: Fuse for +24E (A60L-0001-0046#2.0)
Name Symptom observed when fuse has blown Action FUSE1 The LED (ALM-2 or FALM) on the process I/O
board lights, and an alarm such as IMSTP input is output on the teach pendant. (The display data depends on state of peripheral equipment connection.)
1 Check if the cables and peripheral equipment connected to the process I/O board are normal.
2 Replace the process I/O board.
Fuse location is common to JA and JB. The following is figure of JA.
FUSE1
(5) Fuse on the process I/O MA,MB
FUSE1: Fuse for +24E (A60L-0001-0046#1.0)
Name Symptom observed when fuse has
blown Action
FUSE1 The LED (ALM1 or FALM) the process I/O board lights.
1. Check if the cables and peripheral devices connected to the process I/O board are normal.
2. Replace the process I/O board.
FUSE1 (1A) LED:FALM（Red）
LED:ALM1（Red）
Fig.3.6 (e) Fuse on the process I/O board MA
LED:ALM1 (Red) LED:FALM (Red)
FUSE1 (1A)
Fig.3.6 (f) Fuse on the process I/O board MB
(6) Fuse on the sensor I/F unit for CR-35iA
FUSE: For internal power supply circuit (A60L-0001-0290#LM20)
Name Symptom observed when fuse has blown Action
FUSE The LED of the sensor I/F unit lights. 1. Check if the cables and peripheral devices connected to the sensor I/F unit are normal.
2. Replace the sensor I/F unit.
FUSE LED(Red) FUSE (2A)
Fig.3.6 (g) Fuse on sensor I/F unit for CR-35iA