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East EA900RT 1kVA-10kVA Rackmount UPS Equipment information & support

The East EA900RT is an enterprise-grade 1kVA-10kVA double-conversion online high-frequency UPS featuring a convertible 2U/3U rackmount and tower form factor, engineered to deliver pure sine wave output and zero-transfer-time AC power backup across an ultra-wide input voltage envelope for mission-critical telecom and industrial IT networks.

Equipment information

Brand
HEFENGQI
Equipment model
East EA900RT 1kVA-10kVA Rackmount UPS
Equipment type
UPS power
Controller / software version
Confirm against the installed equipment
View full product specifications
East EA900RT 1kVA-10kVA Rack/Tower Dual Conversion Online High-Frequency UPS (2U/3U)

Information below comes from the current product catalogue. Confirm the controller, software version and configuration of the installed equipment separately.

Rated Output Power
1kVA ~ 10kVA (Output Power Factor 0.9 / 1.0)
UPS Topology Type
Double-Conversion Online High-Frequency Pure Sine Wave Output
Physical Form Factor
Convertible Rack/Tower Mounting Design (2U/3U Height)
AC Input Voltage Range
110V AC ~ 300V AC (Ultra-Wide Single-Phase Grid Tolerance)
System Comprehensive Efficiency
≥ 95% (Up to 98% in ECO Energy-Saving Mode)
Battery Connection Mode
Supports Internal High-Rate Batteries or External Battery Enclosures

Alarms & troubleshooting

INV_FAULT / Er05 (Inverter Hardware Fault)
Fault LED solid red, Inv LED off, Bypass LED solid yellow/on, continuous buzzer tone
Inverter IGBT bridge puncture/breakdown, drive circuit failure, or output voltage feedback loop open circuit; system forced to bypass
1. Confirm bypass line stability to verify protected IT load status. 2. Disconnect loads progressively, switch off UPS AC mains breaker, and open DC battery breaker. 3. Wait 10 minutes for DC bus capacitors to discharge; test inverter IGBT resistance and replace the main power board if shorted.
BATT_OPEN / Er11 (Battery Disconnected / Open Circuit)
Warning LED blinking yellow (0.5Hz), Battery icon flashing on LCD, buzzer beeps once per second
External battery pack breaker open, DC inline fuse blown, loose battery Anderson connector, or total string voltage below cold start threshold
1. Verify the rear-panel DC connector and external battery bank breaker are fully closed and secured. 2. Measure total battery bank DC voltage with a multimeter to ensure it matches nominal voltage specifications. 3. Check continuity of DC fuses; inspect individual battery blocks for short circuits and replace blown fuses with identical ratings.
OVER_LOAD / Er07 (Output Overload Alarm / Bypass Active)
Fault or Warning LED solid red/yellow, Load capacity bar graph flashing at 100%, buzzer rapid beeping or continuous tone
Connected telecom/server load exceeds rated capacity (>105% sustained or >130% transient peak); UPS shifts to bypass protection mode
1. Review real-time total output load percentage and phase currents on the LCD display. 2. Immediately shed non-critical servers or balance downstream PDU branch circuits to reduce total load below 80%. 3. Once load is normalized, clear the fault state via LCD control menu or reboot cycle to restore normal Inverter operation.
OVER_TEMP / Er08 (Internal Heatsink Over-Temperature)
Fault LED solid red, OverTemp icon flashing on LCD panel, continuous audible buzzer
Chassis airflow blocked by dust, cooling fan locked-rotor failure, ambient datacenter temperature exceeding 45°C, or faulty NTC temperature sensor
1. Inspect front and rear chassis vents for obstructions; clear dust from intake filters and internal heatsinks. 2. Observe rear cooling fans; if any fan is stalled or generating abnormal noise, replace it with an OEM spare part. 3. Measure rack intake temperature and regulate HVAC air conditioning to maintain an ambient environment between 0°C and 40°C.
BUS_FAULT / Er01 (DC Bus Voltage Abnormal / Overvoltage)
Fault LED solid red, LCD displays Er01, UPS executes emergency inverter shutdown and lockout
PFC boost inductor or fast-recovery diode degradation, electrolytic capacitor aging causing voltage imbalance, or inductive load dump transient
1. Transfer the load to an external maintenance bypass; do not repeatedly attempt forced power-on under lockout. 2. Disconnect AC mains and battery inputs; verify with a meter that positive/negative DC bus voltages decay below safe levels (<10V). 3. Measure PFC power switches and balance resistor dividers; replace leaking/bulging bus capacitors or defective control boards.

Access Complete Maintenance & Full Alarm Troubleshooting Manual

This page lists high-frequency critical alarm codes commonly encountered in field maintenance. Comprehensive manufacturer troubleshooting matrices, board-level repair guides, detailed electrical schematics, and firmware commissioning manuals are delivered alongside equipment upon formal project procurement, accompanied by dedicated FAE technical support.

Contact Account Manager for Full Manual

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