9800, 9700, 9400 and 9300

9800 / 9700 / 9400 / 9300 Appliances have a redundant power supply unit (PSU) and support DC PSUs.

If necessary, you can replace a PSU. Note that all PSUs on an appliance must be of the same type (DC).

Warning: To protect yourself and the appliance PSUs from electrostatic discharge, make sure that you are electromagnetically grounded before you install, uninstall, or replace a PSU. We recommend that you use an ESD grounding wrist strap. Connect the grounding plug on the wrist strap to the appliance grounding point.

Warning - All work related to the DC power must be performed by trained and certified service personnel only.

Important - Each of the three DC power wires must be: 12 AWG, copper.

Important - The DC power source must be reliably grounded.

9800 / 9700

9400 / 9300

Legend

Item	Description
1	DC Power Supply Unit
2	Alarm off button
3	DC PSU terminal block
4	ESD grounding point

Removing a DC Power Supply Unit

Legend

Item	Description
1	DC power connector (terminal block)
2	DC return terminal (RTN)
3	DC -36 — -72V terminal
4	DC ground terminal ()
5	Release lever
6	LED indicator for each power supply unit: 9800 / 9700: Off - No power cord is connected to any PSU in the system Blue - System is on Blinking blue - Power cords are connected to all PSUs, but the system is off Blinking red - No power cord is connected to this PSU, but the other PSU in the system has a power cord Red - Power supply failure - OCP / OVP / OTP / SCP / fan failure Blinking red / blue - Power supply warning - OTW / OVW / OCW 9400 / 9300: Off - No power cord is connected to any PSU in the system Green - System is on Blinking green - Power cords are connected to all PSUs, but the system is off Blinking red - No power cord is connected to this PSU, but the other PSU in the system has a power cord Red - Power supply failure - out UVP, Vout OVP, Fan RPM fail, OTP, SCP, lout OCP, lin OCP Blinking red / green - Power supply warning - Fan RPM warning, OT warning, lout OC warning, lin OC warning, Vin OV warning, Vin UV warning
7	Extraction handle

To remove a DC Power Supply Unit:

1. Turn off the circuit breaker that supplies power to the DC Power Supply Unit.

   Make sure that the power supply LED is off.

2. On the DC power terminal block, loosen these screws:

   1. -36 — -72V DC terminal

   2. RTN terminal

3. Disconnect the wires from the loosened DC power terminals:

   1. -36 — -72V DC terminal

   2. RTN terminal

4. Loosen the screw from the DC grounding terminal () and disconnect its wire.

5. Hold the DC PSU release lever, push it to the right, and pull the extraction handle simultaneously to remove the DC PSU.

   

   Legend

   Item	Description
   1	Release lever
   2	Extraction handle

Note - To prevent damaging the power supply, use only the extraction handle to remove the DC Power Supply Unit.

Installing a Replacement DC Power Supply Unit

Important - To protect the appliance and the DC Power Supply Units from damage, make sure that you connect the wires to the DC power connector terminals correctly.

To install a replacement DC Power Supply Unit:

1. Turn off the circuit breaker that supplies power to the DC PSU.

2. Insert the replacement DC PSU into its slot and push it until it clicks into place.

3. Connect the DC ground wire to the DC grounding terminal () on the DC PSU and tighten the screw to a maximum torque of 6 kgf/cm².

4. Connect the DC return wire to the RTN terminal on the DC PSU and tighten the screw to a maximum torque of 6 kgf/cm².

5. Connect the DC minus wire to the -36 — -72V terminal on the DC PSU and tighten the screw to a maximum torque of 6 kgf/cm².

6. Turn on the circuit breaker that supplies power to the DC PSU.

7. If the alarm sounds, press the red Alarm Off button located to the right of the DC PSUs.

8. Make sure that the green LED on the DC PSUs is illuminated.