Cardiac stimulators

Fischer Medical Bloom2: troubleshooting and error codes

The ServiceForge knowledge base holds 35 documented symptoms for the Fischer Medical Bloom2, with 39 ranked causes, 70 diagnostic checks with test points and expected values, and 26 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Sense detection not responding to signal

EXT Sense light does not flash, no sensed interval displayed, no audible tone when signal present

Ranked causes

1. Signal not selected or not present at input (common)
2. Incorrect Sync input selected on Console (common)
3. Detection level set incorrectly (occasional)
4. Slope polarity mismatch with signal (occasional)

First check

Verify signal presence at input

Test point: Recording system input
Expected: Signal selected and present

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

S1 impulse delivery not functioning patient safety

LED indicators do not blink during S1 stimulation, no impulses displayed on readout, or ACTIVATE/STOP does not start/stop delivery

Ranked causes

1. Pulse duration set to 0 ms (common)
2. S1 outputs not enabled on channels (common)

First check

Verify pulse duration setting

Test point: Pulse duration control for S1 channel
Expected: Value greater than 00 ms; typically 2.0 ms

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

Burst Calculated Cycle Length Too Short warning patient safety

Burst Mode Adaptive or Adaptive Decrement with calculated cycle length less than 200ms

Ranked causes

1. Calculated Burst cycle length less than 200ms in Adaptive mode (occasional)

First check

Monitor calculated burst cycle in Adaptive modes

Test point: Calculated Burst cycle length
Expected: Calculated cycle length >= 200ms

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

Burst Channel Not Set warning patient safety

No burst channel selected; pressing Burst buttons will produce no output

Ranked causes

1. Burst output channel not selected (common)

First check

Verify burst channel selected before pressing Burst buttons

Test point: Burst channel selection
Expected: One channel selected for burst output

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

Burst Decrement Complete warning patient safety

Burst Mode Adaptive Decrement or Sensed Decrement reached minimum Burst Cycle Length of 200ms

Ranked causes

1. Burst Interval decremented to minimum 200ms in Decrement mode (occasional)

First check

Monitor burst decrement progress

Test point: Current Burst Cycle Length in Decrement mode
Expected: Burst Cycle Length decrements to 200ms then stops

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

Burst Mode Disabled warning patient safety

Burst Mode not set; pressing Burst or Full buttons will produce no output

Ranked causes

1. Burst Mode not configured (common)

First check

Verify Burst Mode configured before pressing Burst button

Test point: Burst Mode setting
Expected: Burst Mode selected with valid parameters

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

Burst mode impulses not delivering patient safety

Burst mode does not produce impulses when enable button pressed, LED indicators do not flash, or impulses deliver without stopping when enable is released

Ranked causes

1. Burst mode not configured or channel not selected (common)

First check

Set Burst Mode to NORMAL

Test point: Burst Mode selector
Expected: Mode set to NORMAL

5 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Burst Sense Timeout warning patient safety

Burst Sync pressed but no sync signal detected within 2 seconds; burst starts in Async mode

Ranked causes

1. No External Sense Signal detected within 2 second timeout in Burst Sync mode (occasional)

First check

Verify sync signal available before Burst Sync operation

Test point: External sense signal on Sync channel
Expected: Valid sync signal detected within 2 seconds of pressing Burst

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

Burst Sensed Cycle Length Too Long warning patient safety

Burst Mode Adaptive or Adaptive Decrement with sensed cycle too long (>= 1000ms)

Ranked causes

1. Sensed cardiac cycle length >= 1000ms in Adaptive Burst mode (occasional)

First check

Monitor sensed cycle length in Adaptive Burst modes

Test point: Sensed cardiac cycle length
Expected: Sensed cycle length < 1000ms

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

Calibration: Threshold determination using S1 Mode=INC/DEC patient safety

Procedure to find minimum electrical stimulation impulse required for cardiac depolarization using continuous impulse delivery method

Ranked causes

1. Need to determine cardiac stimulation threshold (common)

First check

Select S1 Mode=INC/DEC

Test point: S1 Mode selector
Expected: INC/DEC mode active, continuous impulse delivery enabled

5 more checks with pass and fail actions, 10 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Threshold determination using S1 Mode=NORMAL patient safety

Procedure to find minimum electrical stimulation impulse using standard functionality with PAUSE OFF

Ranked causes

1. Need to determine cardiac stimulation threshold via normal mode (common)

First check

Select S1 MODE=NORMAL and configure controls

Test point: S1 MODE selector; Sense/S1 Pace; SYNC/ASYNC; PAUSE controls
Expected: S1 MODE=NORMAL; Sense/S1 Pace=S1 Pace; SYNC/ASYNC set; PAUSE=OFF

5 more checks with pass and fail actions, 10 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Daily checkout procedure incomplete or failed patient safety

Error codes appear during daily startup check on Floater or Console screen, LED indicators do not blink during impulse delivery, or unit does not respond to control inputs

Ranked causes

1. Unit not fully powered up or operating system not ready (common)

First check

Verify no patient connections are made

Test point: Stimulator output connectors to patient
Expected: All connections disconnected

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

Driver Fault error patient safety

One of the channel outputs has a fault and unit will not run

Ranked causes

1. Output driver malfunction on one or more channels (rare)

First check

Power cycle system and observe startup

Test point: System power and display
Expected: Self-test completes without Driver Fault error

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

Emergency Pacing Active warning patient safety

Emergency Pace button pressed on Stimulator; unit is pacing in emergency mode

Ranked causes

1. Operator pressed Emergency Pace button on Stimulator (common)

First check

Monitor Emergency Pace mode status

Test point: Emergency Pace button state
Expected: Emergency Pace button released when normal pacing to resume

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

Equipment damage or integrity concern detected patient safety

Visible damage to cables, connectors, power receptacle, or front panel buttons; uncertainty about component integrity

Ranked causes

1. Physical damage from handling or previous use (occasional)

First check

Inspect cables for damage

Test point: All signal and power cables
Expected: No visible cracks, cuts, delamination, or exposed conductors

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Extra Stimuli Channel Not Set warning patient safety

Pause is on but no extra-stimuli (S2-S6) selected on output channels

Ranked causes

1. Extra-stimulus not selected despite Pause enabled (occasional)

First check

Confirm extra-stimulus selection when Pause mode enabled

Test point: Extra-stimulus enable flags (S2-S6)
Expected: At least one extra-stimulus selected or Pause disabled

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

Extra Stimuli Requires Pause Interval warning patient safety

Extra-stimulus (S2-S6) selected but Pause is off; may not allow time to complete extra-stimuli

Ranked causes

1. Extra-stimulus enabled without Pause interval (occasional)

First check

Verify Pause is enabled when extra-stimuli (S2-S6) are selected

Test point: Pause enable flag and Pause Interval
Expected: Pause enabled with appropriate interval when extra-stimuli active

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

Low Burst Coupling Interval warning patient safety

Burst Mode Sensed or Sensed Decrement and Burst Cycle Length less than or equal to 200ms

Ranked causes

1. Burst Cycle Length 200ms or less in Sensed or Sensed Decrement mode (occasional)

First check

Monitor Burst Cycle Length in Sensed modes

Test point: Burst Cycle Length parameter with Sensed or Sensed Decrement mode
Expected: Burst Cycle Length > 200ms

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

Low Burst Cycle Length warning patient safety

Burst Cycle Length less than or equal to 200ms; may not have desired physiological effect

Ranked causes

1. Burst Cycle Length set to 200ms or less (occasional)

First check

Monitor Burst Cycle Length setting

Test point: Burst Cycle Length parameter
Expected: Burst Cycle Length > 200ms for optimal physiological effect

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

Low Coupling Interval warning patient safety

One or more extra-stimuli (S2-S6) interval is 100ms or less

Ranked causes

1. Extra-stimulus interval set to 100ms or less (occasional)

First check

Monitor extra-stimulus coupling intervals

Test point: S2-S6 Interval parameters
Expected: All extra-stimulus intervals > 100ms

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

Low S1 Cycle Length warning patient safety

S1 Interval is 300ms or less with Pace selected; extra care required with short interval

Ranked causes

1. S1 Interval set to 300ms or less with Pace mode active (occasional)

First check

Monitor S1 Interval when Pace mode active

Test point: S1 Interval parameter
Expected: S1 Interval > 300ms or Pace mode inactive

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

Minimum Burst Coupling Interval warning patient safety

Burst Mode Sensed or Sensed Decrement with Burst Cycle Length at minimum 200ms

Ranked causes

1. Burst Cycle Length at minimum 200ms in Sensed or Sensed Decrement mode (occasional)

First check

Verify Burst Cycle Length above minimum in Sensed modes

Test point: Burst Cycle Length parameter with Sensed or Sensed Decrement mode
Expected: Burst Cycle Length > 200ms

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

Minimum Burst Cycle Length warning patient safety

Burst Cycle Length at minimum value of 100ms; will not go lower and may not achieve desired effect

Ranked causes

1. Burst Cycle Length set to minimum 100ms value (occasional)

First check

Verify Burst Cycle Length not at minimum

Test point: Burst Cycle Length parameter
Expected: Burst Cycle Length > 100ms

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

Minimum Coupling Interval warning patient safety

Extra-stimuli (S2-S6) interval set to minimum allowed 50ms

Ranked causes

1. Extra-stimulus interval set to 50ms minimum value (occasional)

First check

Verify extra-stimulus coupling intervals not at minimum

Test point: S2-S6 Interval parameter
Expected: Interval > 50ms

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

Minimum S1 Cycle Length warning patient safety

S1 Interval is 140ms or less with Pace selected or Inc/Dec S1 mode

Ranked causes

1. S1 Interval set to 140ms or less in Pace or Inc/Dec mode (occasional)

First check

Monitor S1 Interval minimum threshold

Test point: S1 Interval parameter with Pace or Inc/Dec mode
Expected: S1 Interval > 140ms

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

Mode Change While Running error patient safety

Mode was changed during active stimulation that affects output

Ranked causes

1. Operator changed mode parameters during active stimulation (occasional)

First check

Verify no mode changes occur during active stimulation

Test point: Console display and control state
Expected: No error displayed after mode change only while system inactive

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

No A/V Channel Set warning patient safety

A/V 1:1 or A/V 2:1 selected but S2 not enabled on any channels

Ranked causes

1. A/V mode selected without S2 enabled on output channels (occasional)

First check

Verify S2 enabled on channel when A/V mode selected

Test point: S2 enable flag on output channels
Expected: S2 enabled on at least one channel when A/V 1:1 or 2:1 active

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

No External Sense Detected warning patient safety

No External Sense Signal detected; prevents stimulation in Sync mode or with Sense selected

Ranked causes

1. Sense signal not present or improperly configured (common)

First check

Verify external sense signal present

Test point: Sense input signal
Expected: Valid signal detected on selected Sync channel

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

Odd number of S1s in A/V mode error patient safety

Stimulation attempted with odd number of S1s in A/V 2:1 mode requiring even number

Ranked causes

1. S1 count set to odd number in A/V 2:1 mode (occasional)

First check

Verify S1 count is even number when A/V 2:1 mode selected

Test point: S1 parameter field
Expected: Even number (2, 4, 6, etc.)

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

Pace Channel Not Set warning patient safety

System in Pace mode but no S1 enabled on any output channel

Ranked causes

1. S1 not enabled on any pacing channel (common)

First check

Verify S1 enabled on at least one output channel in Pace mode

Test point: Channel S1 enable flags
Expected: S1 enabled on one or more channels when Pace mode active

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

Parameter Fault error patient safety

Attempt made to set stimulator parameter to illegal or unexpected value

Ranked causes

1. Invalid parameter value entered or system malfunction (rare)

First check

Review all parameter settings in Console

Test point: Stimulator parameter fields
Expected: All parameters within valid operating ranges

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

S2–S6 extra stimulus delivery not functioning patient safety

Extra stimulus (S2–S6) does not deliver after specified number of S1 beats, or LED does not indicate multi-beat delivery

Ranked causes

1. S1–S6 outputs not enabled or intervals not configured (common)

First check

Set S1 mode to NORMAL

Test point: S1 mode selector
Expected: Mode selector set to NORMAL

5 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Stuck Button warning displayed caution

Self-test detects button depressed or out of alignment during power-up

Ranked causes

1. Object resting on buttons or button depressed/misaligned (common)

First check

Inspect all buttons on three system components

Test point: Bloom2 buttons
Expected: All buttons free, not depressed, properly aligned

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

Sync Channels Not Available warning patient safety

One or more Sync channels non-operative; indicates equipment fault

Ranked causes

1. Sync channel hardware malfunction or sensor failure (rare)

First check

Verify operational Sync channels available

Test point: Sync channel function on available channels
Expected: At least one Sync channel operative for sensing

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

System does not become operational patient safety

Self-test errors prevent unit operation on power-on or reset

Ranked causes

1. Self-test detects errors or warnings (common)

First check

Power on or reset the Bloom2 and observe display

Test point: Graphical Console
Expected: Self-test completes with no errors displayed

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

Error codes

Code	Meaning	Trigger	Severity
`Burst Calculated Cycle Length Too Short`	Burst Adaptive/Adaptive Decrement mode with calculated cycle < 200ms	Calculated Burst cycle length less than 200ms in Adaptive mode	warning
`Burst Channel Not Set`	A burst channel is not selected; no burst output will occur	Burst or Full Burst button pressed when no burst channel configured	warning
`Burst Decrement Complete`	Burst Adaptive/Sensed Decrement reached minimum cycle of 200ms	Burst interval decremented to 200ms minimum in Decrement modes	warning
`Burst Mode Disabled`	Burst Mode is not set; pressing Burst buttons will not produce output	Burst or Full Burst button pressed with Burst Mode unconfigured	warning
`Burst Sensed Cycle Length Too Long`	Burst Adaptive/Adaptive Decrement mode with sensed cycle >= 1000ms	Sensed cardiac cycle length 1000ms or longer in Adaptive Burst mode	warning
`Burst Sense Timeout - Starting Async`	No sync signal within 2 seconds in Burst Sync mode; burst starts Async	Burst Sync selected; no external sense signal detected within 2 second timeout	warning
`Driver Fault`	One of the channel outputs has a fault and the unit will not run	Output driver hardware failure detected during self-test or operation	critical
`Emergency Pacing Active`	Emergency Pace button on Stimulator is activated; unit pacing in emergency mode	Emergency Pace button pressed on Stimulator hardware	info
`Extra Stimuli Channel Not Set`	Pause is on but no extra-stimuli are selected on any output channel	Pause mode enabled with all S2-S6 enables off	warning
`Extra Stimuli Requires Pause Interval`	An extra-stimulus (S2-S6) is selected but Pause is off	Extra-stimulus enabled with Pause mode disabled	warning
`Low Burst Coupling Interval`	Burst Sensed/Sensed Decrement mode with Burst Cycle Length <= 200ms	Burst Mode set to Sensed or Sensed Decrement with cycle <= 200ms	warning
`Low Burst Cycle Length`	Burst Cycle Length is less than or equal to 200ms	Burst Cycle Length parameter set to 200ms or less	warning
`Low Coupling Interval`	One or more extra-stimuli (S2-S6) interval is 100ms or less	Extra-stimulus interval set to 100ms or less	warning
`Low S1 Cycle Length`	The S1 Interval is 300ms or less and Pace is selected	S1 Interval set to 300ms or less with Pace mode active	warning
`Minimum Burst Coupling Interval`	Burst Sensed/Sensed Decrement mode at minimum Burst Cycle Length of 200ms	Burst Mode Sensed/Sensed Decrement with cycle at 200ms minimum	warning
`Minimum Burst Cycle Length`	Burst Cycle Length is at minimum value of 100ms; cannot go lower	Burst Cycle Length set to 100ms minimum; may not produce desired effect	warning
`Minimum Coupling Interval`	Extra-stimuli (S2-S6) interval set to minimum allowed value of 50ms	Extra-stimulus interval set to 50ms minimum value	warning
`Minimum S1 Cycle Length`	S1 Interval is 140ms or less when Pace or Inc/Dec S1 mode selected	S1 Interval set to 140ms or less with Pace or Inc/Dec mode active	warning
`Mode Change While Running`	A mode was changed while running that affects the output	Operator changed mode parameters during active stimulation train	error
`No A/V Channel Set`	A/V 1:1 or A/V 2:1 mode selected but S2 not enabled on any channel	A/V 1:1 or 2:1 mode active with S2 enable off on all channels	warning
`No External Sense Detected`	No External Sense Signal is detected on active Sync channel	Stimulation attempted in Sync or Sense mode with no valid sense input	warning
`Pace Channel Not Set`	The System is in Pace mode but no S1 is enabled on any channel	Pace mode active with all S1 enables off; attempt to pace without S1	warning
`Parameter Fault`	An attempt was made to set a Stimulator parameter to an illegal or unexpected value	Invalid parameter value entry or system software error	error
`#S1s not even in A/V mode`	A stimulation train was attempted with an odd number of S1s in A/V 2:1 mode	Odd S1 count selected when A/V 2:1 mode active and stimulation activated	error
`Stuck Button`	Button depressed or out of alignment; warning clears when button released	Button detected pressed during system power-up self-test	warning
`Sync Channels Not Available`	One or more Sync channels is non-operative; equipment fault indicated	Sync channel hardware detected as non-functional during operation	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.