Oxygen nitrogen generators · POGS family

On Site Gas Systems POGS 33C: troubleshooting and error codes

The ServiceForge knowledge base holds 114 documented symptoms for the On Site Gas Systems POGS 33C, with 194 ranked causes, 327 diagnostic checks with test points and expected values, and 8 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

System will not reach stand-by pressure

System fails to achieve or maintain target standby pressure. Continues cycling without reaching set pressure.

Ranked causes

1. Too much O2 flow (common)
2. Medical air system output too high (common)
3. System leaks (common)
4. Pressure switch setting incorrect (occasional)
5. Process valve failure (rare)
6. Check valve malfunction (rare)
7. Cycle timing incorrect (rare)
8. Sieve material blockage or moisture damage (rare)
9. Timer motor faulty or broken (rare)

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

Low air tank pressure (psig)

Pressure reading below normal operating range. Insufficient tank pressure for operation.

Ranked causes

1. Manual drain valve left open (common)
2. Medical air ports open (common)
3. Inlet air leaking (occasional)
4. Auto drain stuck open (occasional)
5. System leaks (occasional)
6. Pressure gauge malfunctioning (rare)
7. Process valve failure (rare)

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

Unit will not shut off caution

Compressor continues running; pressure does not cut off at 110 psig

Ranked causes

1. Compressor inlet/outlet reversed (occasional)
2. Tank pressure above 110 psig (common)
3. System leak (occasional)
4. Pressure switch incorrectly set (occasional)
5. Drain line solenoid valve stuck open (rare)
6. Blue regulator open or cracked (rare)

First check

Verify inlet/outlet connection

Test point: Generator inlet hose and compressor inlet fitting
Expected: Generator inlet hose NOT connected to compressor inlet

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

Calibration: Operate/Calibrate mode verification

Analyzer reading does not match expected values when set to Operate (90–96% O2) or Calibrate (20.9% O2 in Air) mode

Ranked causes

1. Orifice clogged, restricting flow (common)
2. Sensor cable disconnected (occasional)
3. Fault codes displayed on analyzer (occasional)
4. Sensor expired (occasional)
5. O-ring damaged or sensor not securely threaded (occasional)

First check

Verify arrow position on mode selector

Test point: Mode selector arrow
Expected: Arrow coincides with O2 and Air settings

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

No lights on system

Display and indicator lights not functioning. No visual feedback from equipment.

Ranked causes

1. Circuit breaker tripped (common)
2. House power problem (common)
3. Power switch off (common)
4. Molex connector loose or bad contact (occasional)
5. LED burned out or not connected (occasional)

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

O2 input no output or reduced output caution

Microboost system produces no O2 output or flow rate below specification

Ranked causes

1. O2 generator valve closed (common)
2. System leaks (occasional)
3. Regulator set too low (occasional)
4. Fill valves closed or non-fill valves leaking (occasional)
5. Incorrect cylinder size or flow rate configuration (rare)

First check

Check O2 generator valve position

Test point: O2 generator valve
Expected: Valve at 12:00 (open) position

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

Oxygen pressure too low

Oxygen output pressure insufficient for system demand

Ranked causes

1. Insufficient time for pressure build-up (common)
2. Oxygen outlet valve not fully closed (common)
3. Manual condensate drain valve open (common)
4. Feed air pressure too low (occasional)
5. System leaks (occasional)

First check

Generator pressure build time

Test point: system startup
Expected: 5-10 minutes for pressure to build

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

Unit does not run

Generator on line but compressor not starting; unit remains on standby

Ranked causes

1. Line pressure already at 110 psig (common)
2. Pressure switch not properly set (common)
3. Heaters tripped or wrong size (occasional)
4. Starter box button stuck (occasional)
5. Motor overheating (occasional)

First check

Check air tank pressure

Test point: Air tank pressure gage
Expected: < 110 psig

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

CO Flow alarm

Carbon monoxide analyzer flow rate is abnormal or blocked

Ranked causes

1. Process valve malfunction (occasional)
2. Analyzer filter clogged (occasional)
3. Sample valve in wrong position (occasional)
4. Faulty dryer - no flow post dryer (occasional)

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

Compressor not operating

Feed Air Compressor does not run or generate air supply

Ranked causes

1. Compressor power switch in OFF position (common)
2. Compressor in standby mode (common)
3. Incorrect power source for compressor (occasional)
4. Compressor circuit breaker tripped (common)

First check

Compressor power switch position

Test point: Feed Air Compressor Power Switch
Expected: ON position

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

Generator not operating

Generator does not run or start

Ranked causes

1. Power switch in OFF position (common)
2. Circuit breaker tripped (common)
3. Incorrect power source (occasional)
4. Generator in standby mode (common)

First check

Power switch position

Test point: Generator Power Switch
Expected: ON position

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

Generator runs continuously (does not switch to standby)

Generator continues running instead of entering standby mode when oxygen pressure reaches target

Ranked causes

1. Oxygen being actively used (common)
2. Altitude higher than 5000 ft above sea level (occasional)
3. Oxygen outlet valve not closed (common)
4. Manual condensate drain valve open (common)

First check

Oxygen demand in system

Test point: oxygen outlet valves and flow meters
Expected: no oxygen flow if system not in use

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

HV booster no O2 input or no output high voltage

HV booster produces no output or insufficient O2 flow

Ranked causes

1. O2 generator valve not open (common)
2. System leaks (occasional)
3. Regulator set too low (occasional)
4. Fill valves closed or non-fill valves open (occasional)

First check

Check O2 generator valve open

Test point: O2 generator valve
Expected: Valve open

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

HV Booster will not start high voltage

High Voltage Booster unit fails to start or stalls quickly

Ranked causes

1. Power switch in OFF position (common)
2. Incorrect power source for booster (occasional)
3. Input pressure too low (common)
4. All needle valves closed (common)

First check

HV Booster power switch position

Test point: booster power switch
Expected: HAND or AUTO position

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

No O2 output

HV Booster not producing oxygen output

Ranked causes

1. O2 generator valve closed (common)
2. Output valves closed (common)
3. System leaks (occasional)
4. Regulator set too low (occasional)

First check

Verify O2 generator valve is open

Test point: O2 generator valve
Expected: Valve in open position

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

HV booster system no power high voltage

HV booster does not turn on or respond to power input

Ranked causes

1. Input power not available (common)
2. Manual start switch not in correct position (common)
3. Breaker tripped (occasional)

First check

Check power input

Test point: power switch and outlet
Expected: Power available and switch on

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

Low Flow fault detected by CO monitor caution

CO monitor detects insufficient flow through sensor; audible and visual alarm; prevents accurate CO monitoring

Ranked causes

1. Feed Air Compressor off or not building correct pressure (common)
2. Dirty or clogged Medical Air HEPA filter (common)
3. Clogged particulate filter inside Med-Air 2000 (common)

First check

Recognize Low Flow fault alarm

Test point: Med-Air 2000 monitor audible/visual alarm
Expected: Audible and visual alarm indicating Low Flow fault

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

Microboost system no power caution

Microboost system does not turn on or respond to power input

Ranked causes

1. Input power not available (common)
2. Power switch not engaged (common)
3. Power reset button popped out (occasional)

First check

Check power switch and outlet

Test point: power supply input
Expected: Power available at outlet and switch engaged

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

No green light caution

Power indicator light not illuminated; unit not receiving power or breaker trip

Ranked causes

1. Breaker tripped (common)
2. House power not available (common)
3. Loose connections (occasional)

First check

Check circuit breaker status

Test point: Blue button circuit breaker
Expected: Breaker not tripped

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

Unit does not power on

No power to the HV Booster unit

Ranked causes

1. Input power not supplied (common)
2. Manual start switch not engaged (common)
3. Circuit breaker tripped (occasional)

First check

Verify power switch is on and outlet is powered

Test point: Power switch and outlet
Expected: Switch engaged, outlet live

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

Calibration: Carbon Monoxide (CO) and Dew Point Monitor patient safety

Pre-calibrated from factory; CO sensor requires calibration every 3 months using 20.9% zero gas and 20 PPM CO; dew point sensor replaced every 12 months.

Ranked causes

1. Routine maintenance calibration (common)
2. Dew point sensor end-of-life replacement (common)

First check

Verify CO and Dew Point Monitor display and alarm function

Test point: Monitor display visible when Generator Control Panel opened
Expected: Display shows current CO content of feed air, proper flow through sensor, dew point of medical air

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

CO alarm activated (≥10 PPM detected) patient safety

ENMET Med-Air 2000 sounds loud audible alarm when CO ≥10 PPM detected in feed air; visual alarm on control panel; danger of carbon monoxide poisoning

Ranked causes

1. CO source near Supply Air Filter Assembly on Feed Air Compressor (common)
2. Interfering substances (methane, propane, alcohols, aerosols, solvents, etc.) (occasional)

First check

Recognize audible and visual CO alarm

Test point: Monitor display and Audible Alarm Fig 2.7
Expected: Loud audible alarm sounding; visual indicator on control panel

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

CO Dew Point alarm

Dew point measurement from CO analyzer is inaccurate or sensor is faulty

Ranked causes

1. Faulty drier (occasional)
2. Dew Point sensor fault (occasional)

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

Crossover Valve does not operate properly

Crossover Valve fails to open in Operate Mode or fails to close in Standby Mode or when power is off. Valve normally warm during operation as it remains energized in Operate Mode.

Ranked causes

1. Wiring problem in Crossover Valve circuit (occasional)
2. Defective Crossover Valve (occasional)

First check

Verify Crossover Valve opens in Operate Mode

Test point: White button at top of Crossover Valve
Expected: White button pulled in (valve open)
Tools: Pen or small screwdriver

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

Improper sample flow through CO and Dewpoint monitor

Med-Air 2000 front panel does not show expected 1.5 to 2.4 SCFH of sample flow after system pressurization

Ranked causes

1. Medical Air Outlet Pressure exceeds 48 PSIG (common)
2. Particulate filter in Med-Air 2000 is clogged (occasional)

First check

Verify Medical Air Outlet Pressure

Test point: Medical Air Outlet Pressure Gauge
Expected: <48 PSIG

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

Low Pressure - Med Air System alarm patient safety

Medical air output pressure or flow is below acceptable levels

Ranked causes

1. Leaks in medical air system (common)
2. Medical Air flow setting too high (occasional)

First check

Verify Medical Air output flow rate

Expected: less than 30 LPM
Tools: flow meter

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

Oxygen purity under 90%

Oxygen analyzer displays purity reading below 90%

Ranked causes

1. Generator not allowed to build purity (common)
2. Oxygen analyzer reading incorrect (occasional)

First check

Generator purge cycle completion

Test point: system operation time and oxygen flow rate
Expected: 15-20 LPM flowing for 45-60 minutes

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

System requires depressurization before maintenance caution

Air and oxygen systems must be depressurized by slowly disconnecting air hose or opening outlet valves before maintenance work

Ranked causes

1. Pressurized system can cause sudden air/oxygen release (common)
2. Pressurized oxygen supply requires venting (common)

First check

Disconnect air hose slowly

Test point: Air hose connection at POGS unit
Expected: Hose disconnects with controlled air release

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

Timer alarm

Compressor timing sequence cycle is incorrect or not meeting specifications

Ranked causes

1. Timing out of specification (occasional)
2. Process valves require inspection (occasional)

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

Too Much O2 Flow alarm patient safety

Oxygen output flow rate exceeds safe maximum of 33 LPM

Ranked causes

1. Leaks in system (common)
2. Too Much O2 Flow - flow meter setting (occasional)

First check

Verify O2 output flow rate

Expected: less than 33 LPM
Tools: flow meter

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

Air inlet filters clogged

Reduced air flow or pressure output from compressor due to dirty inlet filters

Ranked causes

1. Air inlet filters dirty or clogged (common)

First check

Inspect air inlet filters

Test point: Two black filter housings
Expected: Filters clean, no visible dirt or debris

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

Air inlet filters contaminated

Black filter housings require inspection; filter elements may be clogged with environmental debris

Ranked causes

1. Environmental dust and debris accumulation (common)

First check

Inspect air inlet filters for dirt and debris

Test point: Two black filter housings
Expected: Clean filter elements

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

Air inlet filters need inspection

Black filter housings at air inlet require regular inspection for contamination or clogging based on environmental conditions

Ranked causes

1. Filter contamination from environmental conditions (common)

First check

Inspect air inlet filters for contamination

Test point: Black filter housings
Expected: Clean filter elements without visible contamination

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

Air inlet filters require inspection

Two air inlet filters in compressor need regular inspection; filter housings are black and twist-open to access filter elements

Ranked causes

1. Regular maintenance requirement based on environmental conditions (common)

First check

Inspect two air inlet filters

Test point: Black filter housings on compressor
Expected: Clean filter elements

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

Air line filter due for replacement caution

Air line filter has reached three-month service interval and requires replacement; located behind lower panel

Ranked causes

1. Scheduled maintenance interval reached (common)

First check

Depressurize air line before filter change

Test point: Black valve knob bottom left of cabinet
Expected: System depressurized

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

Air line filter needs replacement

Air line filter requires replacement at three month intervals and maintenance cleaning

Ranked causes

1. Air line filter aged and requires replacement (common)

First check

Depressurize air line

Test point: Black valve knob at bottom left of cabinet
Expected: Air pressure released

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

Air line filter requires replacement

Air line filter element at three-month service interval or when flow restriction detected

Ranked causes

1. Three-month service interval reached (common)

First check

Depressurize air line

Test point: Black valve knob, bottom left of cabinet
Expected: Air line fully depressurized

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

Air Tank Pressure alarm caution

Compressor air tank pressure is outside operating range (58-93 psig) or not shutting down at 110 psi

Ranked causes

1. Tank pressure out of range (occasional)

First check

Measure air tank pressure

Test point: air tank pressure gauge
Expected: 58 psig to 93 psig, shutdown at 110 psig, 58-93 psig operating, 110 psig shutdown
Tools: pressure gauge

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

Air tank water bottle full

External water collection bottle fills with condensed moisture from compressed air

Ranked causes

1. Routine moisture condensation (common)

First check

Inspect external water bottle level

Test point: Air tank water bottle outside cabinet
Expected: Bottle empty or at acceptable level

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

Air tank water bottle requires emptying

External water bottle on POGS oxygen generator accumulates condensate requiring daily replacement

Ranked causes

1. Daily drainage requirement for collected water (common)

First check

Inspect and empty air tank water bottle

Test point: External water bottle outside POGS cabinet
Expected: Bottle contains water requiring removal

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

Alarms sound on power-up

Alarms may sound briefly when Generator Power Switch is turned to ON position. Silenced by pressing ALARM ACKNOWLEDGE/AUDIO DEFEAT button on monitor.

Ranked causes

1. Normal initialization sequence (common)

First check

Press ALARM ACKNOWLEDGE/AUDIO DEFEAT button

Test point: Monitor control panel
Expected: Alarms silent; monitor display active

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

Auto Drain Restrictor .031" obstruction clearance caution

The .031 inch restrictor orifice in the auto drain valve is clogged and requires inspection and clearing.

Ranked causes

1. Restrictor orifice blocked with foreign object or debris (occasional)

First check

Shut down Generator and Compressor

Test point: Equipment controls
Expected: Generator and compressor offline

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

Auto start/pressure switch not functioning

Booster does not auto-start at correct pressure

Ranked causes

1. Input pressure below switch threshold (common)

First check

Verify input pressure above threshold

Test point: Input pressure gauge
Expected: > 28 psig

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

Cabinet filter clogged

Reduced compressor performance or airflow from dirty cabinet filter

Ranked causes

1. Cabinet filter dirty or clogged (common)

First check

Inspect cabinet filter

Test point: Center of compressor cabinet
Expected: Filter clean, no visible dirt

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

Cabinet filter contaminated

Center cabinet filter requires inspection and replacement; dust and environmental debris may clog the filter

Ranked causes

1. Environmental dust accumulation in cabinet (common)

First check

Inspect cabinet filter for dirt accumulation

Test point: Center of compressor cabinet
Expected: Clean filter element

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

Cabinet filter needs inspection

Center-mounted cabinet filter requires regular inspection for clogging or contamination based on environmental conditions

Ranked causes

1. Filter contamination from environmental conditions (common)

First check

Inspect cabinet filter for contamination

Test point: Center of compressor cabinet
Expected: Clean filter without visible contamination or clogging

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

Cabinet filter requires inspection

Cabinet filter located in center of compressor cabinet needs regular inspection and replacement

Ranked causes

1. Regular maintenance requirement based on environmental conditions (common)

First check

Inspect cabinet filter

Test point: Center of compressor cabinet
Expected: Clean filter element

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

Calibration of Oxygen Analyzer with Calibration Gas

Two-point calibration procedure using ambient air and calibration gas (80-99.9% purity) to achieve accurate Oxygen Analyzer readings. Regulator must maintain 50 PSIG +/- 5 PSIG calibration gas pressure.

Ranked causes

1. Calibration procedure required for accurate oxygen purity measurement (common)

First check

Verify generator warmup time

Test point: Oxygen Analyzer
Expected: On for at least 30 minutes prior to calibration
Tools: Timer

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

Calibration: Air compressor pressure relief system caution

Systematic test and maintenance of the auto drain restrictor to ensure proper pressure relief operation.

Ranked causes

1. Routine maintenance and inspection (common)

First check

Verify restrictor fitting is accessible

Test point: Lower panel and valve housing
Expected: Lower panel removed, valve visible

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

Calibration: CO monitor zero and span

ENMET Med-Air 2000 CO sensor pre-calibrated from factory; field calibration uses 0 PPM and 20 PPM calibration gases every 3 months

Ranked causes

1. Routine calibration maintenance (common)

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

Calibration: Compressor motor replacement high voltage

Procedure to remove and install a replacement compressor motor on the POGS 33C feed air compressor

Ranked causes

1. Compressor motor failure or end-of-life replacement (unknown)

First check

Disconnect hoses from Supply Air Inlet and Feed Air Outlet

Test point: Underside of Compressor Interior Cover
Expected: Hoses disconnected by loosening hose clamps and pulling off hose barb

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

Calibration: Dew point sensor maintenance

Dew point sensor cannot be field calibrated; requires replacement every 6 months to maintain accurate readings

Ranked causes

1. Sensor aging and drift (common)

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

Calibration: O2 Sensor

O2 sensor requires calibration using certified calibration gas at 90-95% O2 concentration and ambient air reference.

Ranked causes

1. O2 sensor drift requiring calibration (common)

First check

Perform 30 minute warm-up of generator

Test point: Generator system
Expected: System reaches operating temperature

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

Calibration: Oxygen analyzer single-point (ambient air)

Stabilize analyzer for 30 minutes, set valve to CALIBRATE, adjust reading to 20.9% using ambient air reference

Ranked causes

1. Routine oxygen purity monitoring calibration (common)

First check

Allow oxygen analyzer temperature stabilization

Test point: Generator power
Expected: On for at least 30 minutes

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

Calibration: Oxygen analyzer two-point with calibration gas

Two-point calibration using ambient air and regulated calibration gas (80-99.9% purity, 92-95% recommended); requires regulator set to 50 PSIG +/- 5 PSIG and 5/32 SMC tubing adapter

Ranked causes

1. Need for improved accuracy with known reference gas (occasional)

First check

Warm up oxygen analyzer for temperature stabilization

Test point: Generator power
Expected: On for at least 30 minutes

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

Calibration: Pressure Switch adjustment

Adjust pressure switch to set compressor standby mode pressure at 110 psig; plastic barrel clockwise increases reading, counter-clockwise decreases

Ranked causes

1. Pressure switch requires adjustment to 110 psig (common)

First check

Verify pressure switch adjustment

Test point: Pressure Switch
Expected: 110 psig

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

Calibration: Scroll compressor replacement caution

Procedure to remove and install a replacement scroll compressor on the POGS 33C feed air compressor

Ranked causes

1. Scroll compressor failure or end-of-life replacement (unknown)

First check

Shutdown feed air compressor and generator

Test point: Power switches
Expected: Equipment powered down per section 10.6 procedures

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

Calibration: Timing Assembly finger adjustment

Align timing assembly fingers on three gears to control compressor valve actuation; fingers must be positioned in specific directions and angular spacing based on 60-second rotation cycle

Ranked causes

1. Timing assembly requires finger alignment (common)

First check

Set bottom gear fingers

Test point: Bottom gear
Expected: Two fingers 180 degrees apart, one up and one down

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

CO Calibration OFF alarm

Carbon monoxide analyzer calibration is disabled or not set

Ranked causes

1. Calibration not performed (common)

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

CO Contamination alarm high voltage

Carbon monoxide detected in system output, exceeding safe limits

Ranked causes

1. CO source from fuel powered motors or forklifts (common)

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

More symptoms

CO Faulty Analyzer alarm
CO monitor calibration fault
Compressor Pressure Regulator Open too Much
Cooling Air Filter Element maintenance
Dew point alarm activated (>39°F detected)
Equipment fails to supply clean medical air
External air tank water bottle full
HEPA Filter replacement - Medical Air
HEPA Filter replacement - Oxygen
HEPA filters due for replacement
HEPA filters need replacement
HEPA filters require replacement
Humidity alarm
Lack of flow to Medical Air Outlet ports
Low Flow Pressure alarm
Low Pressure - Check Valves alarm
Low Pressure - Process Valves alarm
Low purity output
Medical Air Filter replacement required
Monitor resumes operation after power loss
No air output from oxygen generator
No pressure reading in Medical Air Gage
No water drains from manual condensate drain valve
Oxygen analyzer alarm: Excessive flow condition
Oxygen analyzer ERx error (serious internal fault)
Oxygen analyzer FAULT light illuminated
Oxygen Analyzer low purity reading
Oxygen check valve leakage
Oxygen purity drops below alarm threshold
Particulate Filter Assembly replacement
Pre-maintenance power disconnection required
Purity Air temperature high
Purity Analyzer Calibration alarm
Purity Excessive Flow alarm
Purity Faulty Setting alarm
Purity Leaks alarm
Purity Sensor Age alarm
Purity Sensor Orifice Closed alarm
Purity Sensor Out of Cal alarm
Purity Warm Up Time alarm
Replacement: Pressure Switch
Sensor orifice blocked or restricted
Side Cooling Air Filter Element maintenance
Sieve bed check valve failure
Sieve bed check valve vibration
Sieve bed protection during removal
Sieve beds require protection when removed
System depressurization required
Test oxygen analyzer alarm function
Unit requires power disconnection before maintenance
Water accumulation in air tank
Water accumulation in POGS air tank
Water bottle full in POGS oxygen generator
Water in air tank

54 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`01, 02, 03`	Calibration fault codes for ENMET Med-Air 2000 CO/dew point monitor	Internal sensor calibration drift or fault detected during operation	warning
`≥10 PPM CO`	Carbon monoxide alarm indicating dangerous CO level in feed air	CO concentration in feed air reaches or exceeds 10 PPM	critical
`>39°F Dew Point`	Dew point alarm indicating excessive moisture in medical air output	Dew point of medical air outlet exceeds 39 degrees Fahrenheit	error
`ALM1`	Oxygen purity alarm indicating purity below preset threshold (89% factory default)	Oxygen purity drops below 89% at generator outlet	warning
`ALM2`	Secondary oxygen purity alarm indicating backup threshold (85% set in analyzer)	Oxygen purity drops below 85% at generator outlet	critical
`ERx`	Serious internal fault in Oxygen Analyzer requiring manufacturer repair	Critical internal fault in oxygen analyzer electronics detected	critical
`FAULT`	Internal fault detected by Oxygen Analyzer; multiple fault codes possible	Internal electronic or sensor fault detected by oxygen analyzer	warning
`Low Flow`	Insufficient flow detected through CO monitor sensor	Feed air flow to CO monitor sensor drops below adequate level	warning

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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.