National Biological Houva II
National Biological · Model Houva II
PhotoSense™ Exposure Control for precise treatment management. Unsurpassed Safety Features including “watchdog” failsafe circuitry. Seven Lamp Configurations including 311nm Narrow Band and UVA-1. Ongoing Unsurpassed Commitment To Service featuring our “Total Support” Warranty and our toll-free help line. External measuring devices included at no additional charge (may be used with all phototherapy equipment). Utilizes "watchdog" circuitry which automatically shuts off the device if it senses a potential malfunction. Designed to never fail in the "ON" position. ON/OFF safety key switches. Non-UV-transmitting viewing window to monitor patient. Exclusive perimeter flow ventilation for patient comfort. Full reflector panels to maximize lamp output. Lamp life monitoring function on hourmeter. Raised floor for proper treatment of lower leg. Hand rails and non-skid floor mat for patient safety. Sturdy screen protection for lamps.
Key tips
- ·Never disable a low-pressure/circuit-disconnect alarm while troubleshooting - silence it, don't disable it.
- ·Verify the O2 supply source and pressure before assuming an internal fault.
- ·Circuit type must match the patient population (adult/pediatric/neonatal) - a mismatched circuit invalidates delivered volumes.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Will not power on or unexpected shutdown
HighSymptoms: The ventilation & respiratory is dead, reboots, or shuts down mid-use.
Root cause: Mains lead / fuse, an aged battery, or a power-supply board fault.
Battery will not hold charge
MediumSymptoms: Short run time on battery; low-battery alarm soon after a full charge.
Root cause: Aged rechargeable battery pack or a charger fault.
Display / control-panel fault
MediumSymptoms: Blank, dim or distorted display; unresponsive keys or touchscreen.
Root cause: Display, backlight, or control-board fault.
Fails self-test or calibration
MediumSymptoms: Power-on self-test or the scheduled performance check fails or is out of tolerance.
Root cause: Sensor drift or an internal board fault; recalibration or repair needed.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Rechargeable battery pack
Class Periodic replacementRel. cost $$R&R Fairly easy
Power supply / mains board
Class Major service partRel. cost $$$R&R Difficult
Display / control-panel assembly
Class Major service partRel. cost $$$R&R Moderate
Cooling fan
Class Major service partRel. cost $R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Rechargeable battery pack | Periodic replacement | $$ | Fairly easy |
| Power supply / mains board | Major service part | $$$ | Difficult |
| Display / control-panel assembly | Major service part | $$$ | Moderate |
| Cooling fan | Major service part | $ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Daily pre-use check: self-test, circuit integrity, alarm function
- ·Scheduled circuit and inspiratory filter replacement per manufacturer interval
- ·Flow and pressure sensor calibration verification
- ·Battery load test and runtime check
- ·Annual full PM and electrical safety test
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Will not power on
- Confirm the outlet, mains lead and fuse.
- Try on battery, then on mains only, to isolate the supply.
- Look for a power indicator or POST code.
- Replace the fuse / battery / power supply as isolated.
- Run the self-test after any repair.
Symptom: Fails self-test or calibration
- Note the exact failure message / code.
- Power-cycle and repeat the self-test.
- Verify against a reference / simulator where one applies.
- Recalibrate per the service manual.
- Refer the affected board for service if it will not hold calibration.
Technical Specs
- Height
- 87 in
- Length
- 49 in
- Width
- 46 in
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- ICU / CCU
- Emergency Department
- Operating Room (anesthesia-adjacent)
- NICU
- Respiratory Therapy department
- Patient transport
Documents & Manuals
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