User Manual for IOTA IISM Modular Inverter Series

Important Information

This manual provides instructions for the IOTA IISM Modular Inverter Series (1000W-2000W). This unit is a microprocessor-controlled PWM pure sine wave inverter designed for emergency lighting loads. It features an automatic 3-rate battery charger, self-testing capabilities, and a digital meter display. The unit is intended for indoor use only.

Safety Precautions

• Lethal Voltages: This unit contains lethal voltages. All repairs and service must be performed by authorized service personnel only. There are no user-serviceable parts inside.
• Battery Handling: Use caution when servicing batteries. They contain acid or alkali and can cause burns. If fluid spills on skin or eyes, flush with fresh water and contact a physician immediately.
• Environment: Do not install outdoors, near heaters, or in high-temperature locations. Ensure the area is clean, cool, dry, and well-ventilated.
• Tampering: Mount in locations where unauthorized personnel cannot access the unit.

Startup and Shutdown Procedures

Startup Procedure:

1. Verify the installation switch below the front panel is in the OFF position.
2. Verify AC input is disconnected.
3. Turn on the DC Circuit Breaker CB1.
4. Energize the Mains AC input via the upstream distribution panel breaker.
5. Turn the installation switch to the ON position. The display should illuminate, and the unit will begin charging.
6. Turn on the output circuit breaker(s).

Shutdown Procedure:

1. Interrupt AC Mains via the distribution panel or input circuit breaker.
2. Turn the installation switch on the inverter chassis to the OFF position.
3. Turn off the DC Circuit Breaker CB1.

Front Panel Operation

The front panel includes a 2x20 alphanumeric LCD display, 5 status LEDs, and a 4x4 keypad. Functions are divided into Meter, Control, and Program menus.

• Meter Functions: Allows monitoring of Voltage Input/Output, Current Output, Battery Voltage/Current, VA Output, Inverter Watts, Inverter Minutes, Temperature, and System Days.
• Control Functions: Provides access to Test Logs, Event Logs, manual testing, Alarm Logs, and Buzzer Silence.
• Program Functions: Password-protected (default 1234). Allows configuration of Date, Time, Test schedules, Load Reduction, and various Alarm thresholds (Low/High VAC, Ambient Temp, Near Low Battery).

Maintenance

Periodic maintenance ensures long-term operation. The system performs self-tests monthly (5 minutes) and annually (90 minutes). Key maintenance tasks include:

• Battery Inspection: Check connections for tightness and corrosion every 6 months.
• Cleaning: Keep air vents free of obstructions. Clean dust from inside the cabinet and fans annually.
• Testing: Perform manual tests only when critical loads are connected.

Troubleshooting

If the system fails to operate, check the following:

• Inverter will not run during power failure: Check if the installation switch is OFF, DC circuit breaker is tripped, or if there is no AC input.
• System overheating/smells: Check for blocked vents or high ambient temperatures.
• Battery voltage low/non-existent: Inspect battery connections, fuses, and battery health.