Ultrasound therapy systems · Intelect / Genisys family

Chattanooga 2776: troubleshooting and error codes

The ServiceForge knowledge base holds 17 documented symptoms for the Chattanooga 2776, with 51 ranked causes, 18 diagnostic checks with test points and expected values, and 14 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Ultrasound duty cycle output incorrect

Power meter readings fall outside specified ranges for 10%, 20%, 50%, or 100% duty cycle settings at 1 MHz or 3.3 MHz frequency

Ranked causes

1. Bad or contaminated degassed water in power meter (common)
2. Wrong power meter model used (occasional)
3. Applicator out of calibration or defective (occasional)
4. Ultrasound board defective (rare)
5. Control board defective (rare)

First check

Verify degassed water is in power meter reservoir

Test point: Power meter reservoir
Expected: Clear degassed water, no aeration bubbles visible

6 more checks with pass and fail actions, 5 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 201: Applicator calibration save error

System fails to save calibration data to applicator EEPROM during calibration procedure.

Ranked causes

1. Bad Applicator (common)
2. Bad Applicator Cable (common)
3. Applicator PCB Connector Bad (occasional)
4. Bad Ultrasound Board (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 202: General applicator calibration error

System encounters unspecified error while attempting to calibrate an applicator.

Ranked causes

1. Bad Applicator (common)
2. Bad Applicator Cable (common)
3. Applicator PCB Connector Bad (occasional)
4. Bad Ultrasound Board (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 203: Applicator EEPROM save timeout

System timeout while attempting to save calibration data to applicator EEPROM.

Ranked causes

1. Bad Applicator (common)
2. Bad Applicator Cable (common)
3. Applicator PCB Connector Bad (occasional)
4. Bad Ultrasound Board (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Ultrasound applicator output out of range

Power meter readings fall outside specified ranges for applicator at given settings.

Ranked causes

1. Bad degassed water in power meter (common)
2. Wrong power meter used (occasional)
3. Bad or out of calibration applicator (occasional)
4. Bad Ultrasound Board (occasional)

First check

Set up power meter per manual

Test point: Power meter reservoir
Expected: Applicator submerged in degassed water, centered over SS cone

4 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Applicator not calibrated (NO CAL displayed)

Display shows 'NO CAL' icon after applicator is connected.

Ranked causes

1. Applicator not calibrated (common)
2. Bad Applicator (occasional)
3. Bad Ultrasound PCB (occasional)

First check

Connect applicator and check display

Test point: Display center
Expected: Applicator detected icon without NO CAL icon

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 300: Critical ultrasound board error

System detects critical ultrasound board fault of unknown origin.

Ranked causes

1. Ultrasound Board to Control Board header loose or disconnected (common)
2. Bad Ultrasound Board (occasional)
3. Bad Control Board (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 301: Ultrasound board not detected

System cannot detect presence of ultrasound board during initialization.

Ranked causes

1. Ultrasound Board to Control Board header loose or disconnected (common)
2. Bad Ultrasound Board (occasional)
3. Bad Control Board (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 302: Ultrasound board reset

Ultrasound board has unexpectedly reset for unknown reason.

Ranked causes

1. Ultrasound Board to Control Board header loose or disconnected (common)
2. Bad Ultrasound Board (occasional)
3. Bad Control Board (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 303: Ultrasound board read error

System error reading data from ultrasound board.

Ranked causes

1. Ultrasound Board to Control Board header loose or disconnected (common)
2. Bad Ultrasound Board (occasional)
3. Bad Control Board (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 304: Ultrasound board write error

System error writing data to ultrasound board.

Ranked causes

1. Ultrasound Board to Control Board header loose or disconnected (common)
2. Bad Ultrasound Board (occasional)
3. Bad Control Board (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 305: Applicator calibration error

System error encountered during applicator calibration procedure.

Ranked causes

1. Ultrasound Board to Control Board header loose or disconnected (common)
2. Bad Ultrasound Board (occasional)
3. Bad Control Board (occasional)

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Fan not blowing outward caution

Fan either does not blow air or blows inward instead of outward from unit rear.

Ranked causes

1. Fan wired wrong (occasional)
2. Bad Fan (occasional)
3. Bad Power Supply (occasional)

First check

Verify fan direction at unit rear

Test point: Unit rear outlet
Expected: Air blowing outward

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Applicator not detected

Display shows 'Applicator not detected' icon after applicator is plugged in.

Ranked causes

1. Bad Applicator (common)
2. Bad Ultrasound Board (occasional)

First check

Power on unit without applicator

Test point: Display center
Expected: Applicator not detected icon appears

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Main menu does not display

Power button LED present but main menu fails to appear on display after startup.

Ranked causes

1. Bad Control Board (common)
2. Bad Power Supply (occasional)

First check

Check power button LED status

Test point: Power button LED
Expected: LED flashing

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error code 200: EEPROM access error

System displays error accessing internal EEPROM for configuration and protocol storage.

Ranked causes

1. Bad Control Board (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit will not start

System does not power on or respond to power button activation.

Ranked causes

1. Bad Power Supply (common)

First check

Attempt system startup

Test point: Power button
Expected: Unit powers on with beep tones

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`100`	WARN_US_UNPLUGGED: Technician attempted to calibrate ultrasound applicator but none is plugged into system	Calibration initiated without applicator connected	warning
`101`	WARN_US_APPL_BECAME_UNPLUGGED: Applicator came unplugged from system during therapy	Applicator disconnection detected while therapy is active	warning
`200`	Error accessing internal EEPROM	System configuration or protocol read/write failure	error
`201`	Error saving calibration data to applicator EEPROM	Applicator calibration data save failure	error
`202`	General applicator calibration error	Any error during applicator calibration procedure	error
`203`	Applicator EEPROM save timeout	Calibration data save exceeds time limit	error
`300`	Critical ultrasound board error	Ultrasound board malfunction of unknown origin	critical
`301`	Ultrasound board not detected	Ultrasound board not responding during initialization	critical
`302`	Ultrasound board reset	Ultrasound board unexpected reset event	critical
`303`	Ultrasound board read error	Failed to read data from ultrasound board	critical
`304`	Ultrasound board write error	Failed to write data to ultrasound board	critical
`305`	Applicator calibration error	Error during calibration procedure execution	critical
`Icon- No applicator plugged into system`	No applicator is connected to the system	Applicator connection issue detected during operation or calibration	warning
`Icon- Sound Head overtemp`	Sound Head has overheated to a temperature that could cause damage to the crystal	Sound Head temperature exceeds safe limit	warning

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.