Ventilators · paraPAC family

Smiths Medical paraPAC P2: troubleshooting and error codes

The ServiceForge knowledge base holds 23 documented symptoms for the Smiths Medical paraPAC P2, with 45 ranked causes, 70 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Carry case damage or wear

Case lids torn at hinges, stiffeners degraded, straps loose or damaged, edges split, zips non-functional

Ranked causes

1. Case lid hinge tear from mishandling (occasional)
2. Wooden stiffener rigidity lost (occasional)
3. Elastic and Velcro strapping degraded (occasional)
4. Case edge splitting or wear (occasional)
5. Carry handle or strap damage (occasional)
6. Zip mechanism damage or non-functional (occasional)

First check

Inspect case lids for hinge damage

Test point: Case lid hinge areas
Expected: No tears or cracks at hinges
Tools: Visual inspection

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

Regulator assembly physical damage or wear caution

Visual inspection reveals cracks, bends, loose components, or rubber damage

Ranked causes

1. T-handle bent, cracked or stiff (occasional)
2. Gauge bent or damaged (occasional)
3. Gauge rubber shroud damaged or missing (occasional)
4. Secondary relief valve damaged or blocked (CE regulators) (rare)

First check

Inspect T-handle condition and operation

Test point: T-handle assembly
Expected: Straight, undamaged, screws freely
Tools: Visual and manual inspection

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

Ventilator casing or component physical damage caution

Damage to gas fittings, gauge, control knobs, case, labels, or model-specific components (nebuliser outlet, manometer connection)

Ranked causes

1. Physical damage to ventilator body or fittings (occasional)
2. Nebuliser outlet blocked or plug missing (P22D only) (occasional)
3. Manometer connection unsecured or blocked (EP option) (occasional)
4. Damaged labels on front panel (rare)

First check

Inspect gas input and output fittings for damage

Test point: Gas connection fittings
Expected: No cracks, leaks or damage to connection threads

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

Constant Flow Selector Head damage or malfunction caution

Visible damage to selector head, poor mounting, or clickstop mechanism ineffective

Ranked causes

1. Flow head or outlet connector damaged (occasional)
2. Flow head loose mounting (occasional)
3. Clickstop mechanism worn or damaged (occasional)

First check

Inspect flow head for visible damage

Test point: Constant Flow Selector Head body and outlet
Expected: No damage to head or outlet connector
Tools: Visual inspection

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

Control knob misalignment or slippage on spindle

Frequency or Tidal Volume knob indicator marks misaligned with calibration marks or knob has slipped on spindle

Ranked causes

1. Frequency knob misaligned or slipped on spindle (occasional)
2. Tidal Volume knob misaligned or slipped on spindle (occasional)
3. On/Off, Air Mix or Variable Relief knob end cap misaligned (occasional)

First check

Rotate Frequency knob to both extreme limits

Test point: Frequency control knob
Expected: Indicator aligns with both 8 bpm and 40 bpm calibration marks and engages click at 12 bpm

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

Patient hose damage or incomplete circuit patient safety

Patient hose or sensing line shows damage, splits, holes, or EP option circuit incomplete or defective

Ranked causes

1. Hose physical damage (splits, holes) (common)
2. EP option sensing line defective or missing filter (occasional)
3. Patient valve adaptor damaged or misfit (occasional)

First check

Inspect patient hose for visible damage

Test point: Corrugated hose tube
Expected: No splits, cracks or holes visible

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

Patient valve assembly damage or element defect patient safety

Patient valve body cracked, scored, or membrane element torn or split

Ranked causes

1. Patient valve body cracked, split or scored (occasional)
2. Valve element (lip membrane) torn or split (common)
3. Annular disc split or defective (2D/22D models only) (occasional)

First check

Inspect patient valve assembly for cracks and scoring

Test point: Patient valve body
Expected: No cracks, splits or scoring visible on connection faces

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

Control knob stiff or rubbing on front panel

Control knob does not move smoothly, is loose on spindle, or rubs against front panel on one or both sides

Ranked causes

1. Bent spindle causing knob rub and possible needle cartridge damage (occasional)
2. Knob loose on spindle (common)

First check

Rotate each control knob and observe for smooth movement

Test point: All control knobs
Expected: Knobs rotate smoothly without grinding, resistance or sticking

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

Cylinder key condition caution

Cylinder key shows cracking or cable damage

Ranked causes

1. Cylinder key cracked (occasional)
2. Attachment cable frayed or damaged (occasional)

First check

Inspect cylinder key for cracks

Test point: Cylinder key body
Expected: No visible cracks or fractures
Tools: Visual inspection

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

Gauge surround or front panel label not secure or damaged

Gauge surround loose or front panel label punctured, torn or not securely fastened

Ranked causes

1. Gauge surround loosened or damaged (rare)
2. Front panel label punctured, torn or loose (occasional)

First check

Verify gauge surround is firmly fastened

Test point: Gauge surround attachment
Expected: Surround firmly secured; no movement when gently tugged

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

Air entrainment NRV fault

Needle on inflation pressure monitor rises jerkily to 80 cmH2O instead of smoothly in Air Mix mode

Ranked causes

1. Air entrainment NRV internal fault (common)

First check

Set Tidal Volume to 200 mL, Frequency to 25 bpm, Relief valve to maximum

Test point: Control knobs
Expected: Controls set as specified

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

Calibration: Periodic regulator service interval verification

Determine if regulator assembly requires 4-5 year complete disassembly service using datecode chart

Ranked causes

1. Regulator age exceeds 4-5 years (unknown)

First check

Record regulator serial number and model

Test point: Regulator assembly label/marking
Expected: Serial number and model clearly readable
Tools: Visual inspection

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

Constant Flow Selector Head performance out of specification high voltage

Actual flow rate does not match calibrated flowmeter reading at set values

Ranked causes

1. Flow head internal wear or damage (occasional)

First check

Verify flow head setting at 2 L/min

Test point: Calibrated flowmeter outlet
Expected: 1.8 – 2.2 L/min, 1.8 – 2.2
Tools: Calibrated flowmeter (e.g. 500-82636)

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

Gauge rotated in shroud or mispositioned

Inflation pressure monitor gauge not in correct vertical position or has rotated in shroud

Ranked causes

1. Gauge rotated or shifted in shroud (rare)

First check

Verify gauge vertical position in shroud

Test point: Inflation pressure monitor gauge
Expected: Gauge positioned vertically with correct orientation; has not rotated in shroud

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

Input and output connectors unsecured or loose caution

Gas input or output connectors not firmly seated or tightened on ventilator

Ranked causes

1. Input or output connector loosened or not fully seated (common)

First check

Inspect input connector for secure fit and leakage

Test point: Gas input connector
Expected: Connector hand-tight or wrench-tight with no gas leakage or audible hiss

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

Input hose degradation caution

Hose shows age deterioration, internal damage, delamination, blisters or damage to union ends

Ranked causes

1. Hose age beyond 6 years or physical damage (common)

First check

Check hose date code label

Test point: Hose label
Expected: Date of replacement not exceeded (within 6 years)

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

Outlet connector leaking high voltage

Pressure decays at visible rate from contents gauge after cylinder valve closed

Ranked causes

1. Outlet connector loose or damaged (occasional)

First check

Close cylinder valve and monitor contents gauge

Test point: Regulator contents gauge
Expected: Constant pressure reading, no visible decay
Tools: Visual inspection

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

Pin-index yoke movement when disconnected from cylinder caution

Visible movement or play between pin-index yoke and regulator assembly body

Ranked causes

1. Yoke mounting hardware loose (occasional)

First check

Inspect pin-index yoke for movement with regulator disconnected

Test point: Pin-index yoke relative to regulator body
Expected: No visible movement or play when yoke manipulated
Tools: Visual and manual inspection

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

Regulator dynamic output pressure too low high voltage

Dynamic output pressure drops below minimum specification when gas is flowing

Ranked causes

1. Regulator performance degraded (common)

First check

Measure dynamic output pressure during flow

Test point: Test Unit pressure gauge with flow switch ON
Expected: no less than 45 psi (310 kPa), min 45 psi
Tools: Test Unit with pressure gauge and flow switch

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

Regulator output leaking during static condition high voltage

Pressure decays from gauge after cylinder valve closed with regulator de-pressurized

Ranked causes

1. Internal regulator leak (occasional)

First check

Monitor pressure stability after cylinder valve closure

Test point: Test Unit pressure gauge
Expected: Constant reading maintained
Tools: Test Unit with pressure gauge

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

Regulator static output pressure out of range high voltage

Static output pressure reading from test unit falls outside 50-80 psi (345-552 kPa) specification

Ranked causes

1. Main valve seat leaking (common)

First check

Measure static output pressure

Test point: Test Unit pressure gauge
Expected: 50 - 80 psi (345-552 kPa), 50-80 psi
Tools: Test Unit with pressure gauge

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

Sintered filter dirty or obscured

Input connector sintered filter is clogged, dirty or cannot be seen clearly

Ranked causes

1. Sintered filter clogged with debris (common)

First check

Visually inspect sintered filter in input connector

Test point: Input connector filter
Expected: Filter clean and clearly visible; no debris or dust obscuring filter element

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

Ventilator continues to cycle after switched off patient safety

Main pneumatic switch fails to stop cycling when turned to Off or Demand position

Ranked causes

1. Main Pneumatic switch leaking (common)

First check

Select Off or Demand position and observe cycling

Test point: Main pneumatic switch
Expected: Ventilator should stop cycling

1 corrective action and part numbers 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.