Oxygen storage tanks · MOST family

Pacific Consolidated Industries MOST 20-2B: troubleshooting and error codes

The ServiceForge knowledge base holds 13 documented symptoms for the Pacific Consolidated Industries MOST 20-2B, with 17 ranked causes, 24 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

Case assembly damaged or fasteners missing caution

Case has dents, gouges, or missing fasteners; handles, latches, hinges or dolly wheels damaged or difficult to operate

Ranked causes

1. Physical impact or damage during transport or storage (occasional)
2. Fasteners loosened from vibration during transport (occasional)

First check

Inspect case assembly for dents, gouges, and missing or loose fasteners

Test point: Entire case exterior surface and fastener locations
Expected: Case free of dents or gouges; all fasteners present and tight

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

Quick connect fittings contaminated or damaged caution

Quick disconnect fittings show contamination, sticking, or condition issues

Ranked causes

1. Contamination or debris in fittings (occasional)
2. Physical damage to fitting contacts or seals (rare)

First check

Inspect quick connect fittings for general condition and contamination

Test point: Quick disconnect fitting surfaces and seals
Expected: Clean, undamaged fittings with no visible contamination

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

Tubing or fittings leaking or loose caution

Leaks or loose connections detected in tubing and fitting connections

Ranked causes

1. Loose fitting connections from vibration or handling (occasional)
2. Damaged tubing or failed fitting seal (rare)

First check

Inspect all tubing and fitting connections for tightness

Test point: All tube connections and fittings
Expected: All connections tight with no visible gaps or movement

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

Vent valve stiff or handle loose caution

Vent valve does not operate smoothly or valve handle is loose

Ranked causes

1. Handle fastener loose from vibration or handling (occasional)
2. Contamination or debris in valve mechanism (rare)

First check

Inspect vent valve handle for tightness

Test point: Vent valve handle attachment and fasteners
Expected: Handle firmly attached with no movement or looseness

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

Accessories missing or incomplete from tray

Accessories tray does not contain complete set of required components

Ranked causes

1. Items removed or misplaced during previous use or maintenance (occasional)

First check

Verify accessories tray contains required components

Test point: Accessories tray contents
Expected: Tray contains: three flow control valves, three oxygen hoses on racks, one CGA540-to-high pressure quick connect adapter fitting

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

Burst disk protective covers missing or loose patient safety

Burst disk protective covers are not in place or are loose

Ranked causes

1. Covers dislodged during handling or storage (occasional)

First check

Visually verify burst disk protective covers are installed and in place

Test point: Burst disk protective cover locations
Expected: All burst disk protective covers installed and firmly secured

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

Flow control valve delivers incorrect flow rate patient safety

Flow control valve output does not match expected flow rate at specified settings and pressure

Ranked causes

1. Flow control valve internal wear or contamination (occasional)

First check

Assemble test apparatus with tee fitting, master gauge (0-100 psig), and rotameter (0-20 LPM)

Test point: Between supply hose outlet and flow control valve outlet
Expected: Test apparatus fully assembled per steps (b) and (c)

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

Flow control valve stiff or difficult to adjust caution

Flow control valve does not operate smoothly throughout adjustment range

Ranked causes

1. Contamination or debris in valve mechanism (occasional)

First check

Inspect flow control valve for cleanliness

Test point: Flow control valve exterior and adjustment mechanism
Expected: Clean valve with no visible contamination or debris

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

Hose cracked, kinked or cut caution

Visible damage to oxygen supply hoses before use

Ranked causes

1. Physical damage to hoses during storage or handling (unknown)

First check

Visually inspect all hoses for cracks, kinks, cuts or damage

Test point: Entire length of oxygen supply hoses
Expected: No visible cracks, kinks, cuts or physical damage

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

Hose or fitting contaminated with foreign particles or oil high voltage

Evidence of contamination on hoses or quick disconnect connectors

Ranked causes

1. Dust, lint, fine metal particles or oil exposure during storage or handling (occasional)

First check

Inspect hoses and quick connectors for foreign particles and oil contamination

Test point: All hose surfaces and quick disconnect fittings
Expected: No visible contamination, clean surfaces

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

Oxygen hose end fitting damaged or excessively worn caution

Hose end fittings show excessive wear, damage, or poor condition

Ranked causes

1. Normal wear from repeated connect/disconnect cycles (occasional)

First check

Inspect hose end fitting condition

Test point: All hose end fittings and male/female connector surfaces
Expected: No visible damage, corrosion, or excessive wear on fittings

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

Pressure gauge cracked or broken caution

Visible cracks or breaks in pressure gauge glass

Ranked causes

1. Physical impact or damage to gauge glass (rare)

First check

Visually inspect pressure gauges for cracks or breaks in glass

Test point: Pressure gauge lens and housing
Expected: No visible cracks or breaks in glass

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

Unit interior dirty or contaminated caution

Interior assembly has accumulated dust or debris

Ranked causes

1. Dust and lint accumulation during storage or use (occasional)

First check

Inspect interior of MOST20-2B assembly for dust or debris

Test point: Interior surfaces of assembly
Expected: Clean, dry interior with no dust or lint

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.