Temperature management systems · Arctic Sun family

Medivance Arctic Sun 2000: troubleshooting and error codes

The ServiceForge knowledge base holds 83 documented symptoms for the Medivance Arctic Sun 2000, with 158 ranked causes, 141 diagnostic checks with test points and expected values, and 80 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Low water flow or air in pads caution

Low flow rate or continuous air streaming from pads while pump is audible; may follow pad refill cycle

Ranked causes

1. Trapped air bubbles in pads (common)
2. Pad connectors not fully seated in manifold (common)
3. Pad lines kinked or occluded (common)
4. Leak in pad (occasional)
5. Leak at seal between pad connector and manifold (occasional)
6. One pad not functioning properly (occasional)
7. Air leak in manifold (occasional)
8. External or internal fluid system leak (occasional)
9. Pad folded or creased during placement (occasional)
10. Clogged external filter or loose fitting (occasional)
11. Debris in pump valve or internal leak (occasional)
12. Clogged circulating pump internal filter (occasional)
13. Ineffective pump head due to internal debris (rare)

First check

Allow time for air to exit system

Test point: Pad outlet tubes
Expected: No continuous air stream after 20 minutes

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

Control Module is noisy

System produces abnormal audible noise during operation.

Ranked causes

1. Cooling fan failing in Power Module (common)
2. Cooling fan may be failing in Card Cage (occasional)
3. Chiller fan may be failing (occasional)
4. Air trapped in Circulating Pump head (common)
5. Circulating Pump failing (occasional)
6. Mixing Pump failing (occasional)
7. Electronics fault (rare)

First check

Determine when noise occurs

Test point: System audible output during different modes
Expected: Normal operation is quiet or minimal fan hum

6 more checks with pass and fail actions, 7 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Control Module will not fill

System unable to ingest water when fill cycle is initiated; tank remains empty or below normal level.

Ranked causes

1. Pads connected to patient lines prevent suction on fill tube (common)
2. Vacuum leak in patient line manifold valve (occasional)
3. Bypass or Fill Valve fault (occasional)
4. Low voltage circuitry ground fault (rare)
5. Electronics fault (rare)

First check

Verify no pads are connected to patient lines

Test point: Patient line connectors
Expected: All pads physically disconnected from outlet manifold
Tools: Visual inspection

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

Patient temperature not decreasing during cooling patient safety

Despite prolonged cooling procedure, patient temperature remains stable or increases; trend indicator unchanged or rising

Ranked causes

1. Water temperature not at or near minimum setting (common)
2. System in Manual Mode without adequate clinician monitoring (occasional)
3. Inadequate water flow rate during treatment (occasional)
4. Patient shivering interfering with cooling (non-surgical patients) (occasional)
5. Concurrent use of other cooling devices or water blankets (occasional)

First check

Check water temperature on display screen

Test point: Display screen
Expected: At or near minimum water temperature setting

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

Patient temperature not displayed on screen patient safety

Temperature reading missing or not shown on display despite probe connection

Ranked causes

1. Loose connection between probe and cable (common)
2. Probe connected to Patient Temperature 2 instead of Patient Temperature 1 (common)
3. Loose cable connection to control module back (common)
4. Wet temperature cable causing intermittent connection (occasional)
5. Temperature out of measurement range (occasional)

First check

Verify probe to cable connection is secure

Test point: Temperature probe connector
Expected: Fully seated, secure connection

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

System fails to purge completely

Pads do not empty fully during purge cycle; water remains in pads or lines.

Ranked causes

1. Vent line is kinked (common)
2. Water inadvertently entered purge line or valve (occasional)
3. Tank is overfilled (common)
4. Purge valve inoperative (occasional)
5. Electronics fault (rare)

First check

Observe pads and listen during purge initiation

Test point: Pads and system audible output
Expected: Click sound heard and pads empty well

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

Extended period of cold water delivery to patient patient safety

System has delivered water below 10°C/50°F for 8 of the previous 10 hours

Ranked causes

1. Prolonged therapeutic hypothermia at low temperature setting (common)
2. Insufficient water flow through pads (occasional)
3. Inadequate pad coverage or placement (occasional)
4. Environmental interference with cooling (occasional)

First check

Assess patient's skin condition

Expected: No cold-related injuries or excessive shivering

4 more checks with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Patient temperature reading changes significantly within seconds patient safety

Large fluctuations in displayed patient temperature over short time periods, unstable readings

Ranked causes

1. Loose or wet connection between patient temperature probe and cable (common)
2. Foley probe reading affected by retrograde urine flow past sensor (occasional)
3. Probe displaced or in incorrect location (occasional)
4. Temperature probe defective or damaged (occasional)

First check

Check connection between patient temperature probe and cable

Test point: Probe connection point
Expected: Secure, dry connection

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

Unequal flow through bilateral pads patient safety

Flow through one pad differs significantly from the other pad, causing efficiency loss.

Ranked causes

1. Restriction or kink in pad supply line (common)
2. Pads not fully adhered to patient (common)
3. Pads drying out causing loss of adhesion (occasional)
4. Incorrect pad size selection (occasional)

First check

Inspect pad supply lines for kinks

Test point: Entire length of tubing between manifold and pads
Expected: No compression; open path

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

Water cools but unable to cool effectively with patient

Chiller runs but cooling capacity inadequate during patient cooling.

Ranked causes

1. Chiller condenser clogged with lint (common)
2. Chiller Power Relay or cable fault (occasional)
3. Water reservoir level insufficient to run chiller (occasional)
4. Electronics or chiller fault (rare)

First check

Visually inspect condenser for lint blockage

Test point: Chiller condenser area behind plastic grille
Expected: Condenser fins clear of debris

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

Water does not cool to target temperature in Manual Mode

Cooling system unable to bring water temperature down to set point despite chiller operation.

Ranked causes

1. Chiller fault (occasional)
2. Pump cable or connection fault (common)
3. Mixing Pump internal filter clogged (occasional)
4. Electronics fault (rare)

First check

Verify water temperature T4 with cooling command nonzero

Test point: Temperature sensor T4 on display
Expected: T4 stabilizes below 6°C with cooling command active

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

Water does not heat to target temperature in Manual Mode high voltage

System unable to warm water to set temperature when heater is active and flow adequate.

Ranked causes

1. Flow rate less than 800 ml/min (common)
2. Heater fuse open due to heater circuit fault (common)
3. Power Module fault (occasional)
4. Heater thermal breaker tripped (rare)

First check

Measure flow rate in Manual Mode at 42°C target

Test point: Diagnostic display flow indicator or collection vessel
Expected: 800 ml/min or greater

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

Low water flow, low pressure, or high PWM with pump audible

Pump can be heard but flow diagnostic shows no flow or minimal flow despite water appearing to flow.

Ranked causes

1. Flowmeter fault (common)
2. Pump connection fault (common)
3. Pump electronics failure (occasional)

First check

Verify flowmeter operation in diagnostic mode

Test point: User Diagnostic Mode display
Expected: Flow indication present

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

Patient Temperature 1 below control range patient safety

Patient temperature reading below 33°C when system enters Automatic Mode

Ranked causes

1. Patient temperature too low for automatic control (common)
2. Temperature probe or cable defective or displaced (occasional)
3. Control Module calibration error (occasional)

First check

Use CTU to verify Control Module accuracy

Expected: Module reading matches actual temperature

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

Patient Temperature 1 erratic or discontinuous

Patient temperature reading shows significant discontinuity; reading changes erratically for more than 8 minutes

Ranked causes

1. Patient temperature probe or cable defective (occasional)
2. Control Module calibration error (occasional)
3. Intermittent connection at rear connector (occasional)

First check

Use CTU to verify Control Module accuracy

Expected: Reading matches actual temperature

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

Patient temperature not increasing during warming patient safety

Despite prolonged warming procedure, patient temperature remains stable or decreases; trend indicator unchanged or falling

Ranked causes

1. Water temperature not at or near maximum setting (common)
2. Inadequate water flow rate during treatment (occasional)
3. Concurrent use of other warming devices or water blankets (occasional)

First check

Check water temperature on display screen

Test point: Display screen
Expected: At or near maximum water temperature setting

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

Temperature probe 2 malfunction

Probe 2 reading outside display limits or not responding correctly

Ranked causes

1. Temperature probe defective (occasional)
2. Temperature probe cable defective or wet (occasional)
3. Isolation Card defective (rare)

First check

Use CTU to verify Control Module accuracy

Expected: Reading matches actual temperature

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

Water flow rate suddenly decreases caution

Flow to pads drops significantly during operation, may indicate air in lines or damaged pads

Ranked causes

1. Fluid delivery or pad lines compressed, kinked, or not patent (common)
2. Loose connections between pad lines and fluid delivery line (common)
3. Energy Transfer Pad or patient pad line damaged (occasional)

First check

Inspect fluid delivery lines and pad lines

Test point: All lines
Expected: No kinks, compressions, or blockages

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

Water jets from Main Tank Vent in Fill Mode caution

High-pressure water spray exits tank vent during fill operation.

Ranked causes

1. Low conductivity of fluid due to missing Cleaning Solution (common)
2. Level sensor or cable fault (occasional)
3. Electronics fault (rare)

First check

Verify Cleaning Solution was added to fill water

Test point: Fill fluid composition and conductivity
Expected: Cleaning Solution mixed into distilled water before filling

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

Water temperature outside safe range caution

System water temperature above 42.5°C or below 3.5°C; unable to maintain setpoint

Ranked causes

1. Cooling system failure or transient condition (common)
2. Temperature sensor J5 connector loose or damaged (occasional)
3. Solid state relay or temperature cables defective (occasional)

First check

Operate in User Diagnostic Mode and Manual Mode with CTU attached

Test point: T1, T2, T3, T4 temperatures
Expected: T4 above 3°C for at least 10 minutes after stability, > 3C
Tools: CTU

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

Control Module will not power up high voltage

System does not respond to power switch; no lights, fans, or audible indicators.

Ranked causes

1. Power Card fault (common)
2. Service diagnostics failure (rare)

First check

Verify AC power and circuit breaker status

Test point: Power cord and facility outlet
Expected: AC power available at outlet; no breaker trips
Tools: Outlet tester or DMM

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

High Temperature Alert condition patient safety

Patient temperature rises to 39.5°C (103.1°F) with water temperature higher and increasing, triggering alarm that reverts to Stop Mode

Ranked causes

1. Patient temperature approaching or above critical high threshold of 39.5°C (103.1°F) (common)
2. High Temperature Alert threshold requires adjustment for specific patient or procedure (occasional)

First check

Check current patient temperature

Test point: Display screen Patient Temperature reading
Expected: Patient temperature below 39.5°C (103.1°F)

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

Low Temperature Alert condition patient safety

Patient temperature drops to 31°C (87.8°F) with water temperature lower and decreasing, triggering alarm that reverts to Stop Mode

Ranked causes

1. Patient temperature approaching or below critical low threshold of 31°C (87.8°F) (common)
2. Low Temperature Alert threshold requires adjustment for specific patient or procedure (occasional)

First check

Check current patient temperature

Test point: Display screen Patient Temperature reading
Expected: Patient temperature above 31°C (87.8°F)

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

No patient temperature displayed with probe installed patient safety

Temperature display absent or shows no reading despite probe being physically connected.

Ranked causes

1. Open circuit in probe or cable (common)
2. Electronics fault (rare)

First check

Connect probe/cable to another Control Module to test functionality

Test point: Probe and cable assembly
Expected: Temperature displays correctly on test unit

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

Poor water temperature control with good flow

Water temperature regulation inadequate despite normal flow rate through pads.

Ranked causes

1. Main Tank overfilled (common)
2. Heater or chiller circuit fault (common)

First check

Check reservoir level in diagnostic mode

Test point: User Diagnostic Mode level display (Lx)
Expected: Level less than 5

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

Prolonged cold exposure to patient patient safety

System has issued 11 extended cold water delivery alerts; patient experiencing prolonged hypothermia

Ranked causes

1. Therapeutic hypothermia at minimum temperature setting for extended period (common)
2. Patient intolerance to prolonged cold exposure (occasional)

First check

Assess patient's skin condition and core temperature

Expected: Skin intact; core temperature stable at target

1 more check with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Reservoir overfills caution

Tank continues to fill beyond normal full level and overflows.

Ranked causes

1. Level sensor or cable fault (common)
2. Electronics fault after sensor replacement (rare)

First check

Inspect level sensor harness at I/O Card

Test point: Level sensor connector and cable
Expected: Secure connection with no damage or corrosion
Tools: Visual inspection

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

AC power lost caution

Notifies user if AC power was previously lost while power switch was in ON position. Current Mode continues. Audio alarm half-second tone every 2 minutes. Alarm/Alert indicator flashing.

Ranked causes

1. AC power was interrupted (occasional)

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

Calibration and operational check required patient safety

System requires periodic calibration using Calibration and Test Unit (CTU) to verify Patient Temperature inputs accuracy, Temperature Output circuit, and internal water temperature sensors before operational use.

Ranked causes

1. Routine maintenance calibration (common)

First check

Obtain CTU and verify factory calibration data

Test point: CTU unit label
Expected: Factory calibration data present on CTU

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

Diagnostic mode access and monitoring patient safety

Enter diagnostic mode to view system parameters, logs, and test pump/valve operation without therapeutic function

Ranked causes

1. Need diagnostic access to system parameters (common)

First check

Power on unit while holding mode keys

Test point: Control Module power button and remote Automatic and Purge Mode keys
Expected: LCD displays diagnostic home screen after power-up sequence

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

Drained water appears green caution

Water drained from system has greenish discoloration indicating chemical contamination.

Ranked causes

1. Highly alkaline tap water caused copper chelation from chiller evaporator (rare)

First check

Drain all water and inspect residue color

Test point: Drained water appearance
Expected: Clear or pale color when refilled with distilled water

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

Extended period of cold water delivery patient safety

Circulating water temperature below 10°C/50°F for 8 of previous 10 hours. Reoccurs after 4 hours if condition continues. Current Mode continues. Audio alarm half-second tone every 2 minutes. Alarm/Alert indicator flashing.

Ranked causes

1. Extended cold water exposure (occasional)

First check

Measure water flow rate

Test point: Water circulating through pads
Expected: At least 2.3 liters per minute L/min

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

Invalid system log entry caution

In Diagnostic Mode, one or more entries in internal system event log are invalid. Used by designated clinical engineering or Medivance service. Current Mode continues. Audio alarm half-second tone every 2 minutes. Alarm/Alert indicator flashing.

Ranked causes

1. Corrupt system event log (rare)

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

Low bypass flow caution

Insufficient internal flow during priming or bypass mode. Current Mode continues. Audio alarm half-second tone every 2 minutes. Alarm/Alert indicator flashing.

Ranked causes

1. Low bypass flow (unknown)

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

Low fluid pressure in delivery lines caution

Fluid circuit delivering inadequate pressure to pads

Ranked causes

1. Delivery line open to air or leaking (common)

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

Low water flow or air leaving pads

Air is present in pads or water lines affecting delivery.

Ranked causes

1. Air leak in pads or lines (common)

First check

Visually inspect pads and tubing for air bubbles or moisture

Test point: Pad surface and all line connections
Expected: No air bubbles; water flows steadily

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

Low water flow to pads caution

Water circulation to pads decreased significantly

Ranked causes

1. Flow decreased by >50% or <0.3 liters per minute (common)

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

Low water flow with pump inaudible

Pump cannot be heard; pressure sensor shows negative pressure exceeding -8 PSI for more than one minute.

Ranked causes

1. Pressure sensor or cable fault (common)

First check

Measure pressure in diagnostic mode

Test point: System pressure output
Expected: Not more negative than -8 PSI for >1 min

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

Manual mode disabled caution

Manual key pressed while Manual Mode is disabled. System changes to Stop Mode. Audio alarm half-second tone every 10 seconds. Alarm/Alert indicator flashing.

Ranked causes

1. Manual Mode is disabled (occasional)

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

Non-recoverable system error (codes 60-99) caution

System error that cannot be managed without speaking to Medivance. System changes to Stop Mode. Audio alarm half-second tone every 10 seconds. Alarm/Alert indicator flashing.

Ranked causes

1. Internal system failure (rare)

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

Patient Temperature 1 above user-defined limit patient safety

Patient Temperature 1 reading equals or exceeds user-set threshold. Audio alarm half-second tone every 2 minutes, Alarm/Alert indicator flashing.

Ranked causes

1. Temperature setpoint too low or patient overheating (common)

First check

Verify patient temperature from independent source

Test point: Patient monitor or thermometer
Expected: Confirm actual patient temperature

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

Patient Temperature 1 below user-defined limit patient safety

Patient Temperature 1 reading equals or is less than user-set threshold. Audio alarm half-second tone every 2 minutes, Alarm/Alert indicator flashing.

Ranked causes

1. Temperature setpoint too high or patient cooling (common)

First check

Verify patient temperature from independent source

Test point: Patient monitor or thermometer
Expected: Confirm actual patient temperature

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

Patient temperature 1 erratic patient safety

Patient temperature discontinuity. Significant change in patient temperature reading for more than 8 minutes. Current Mode continues. Audio alarm half-second tone every 2 minutes. Alarm/Alert indicator flashing.

Ranked causes

1. Temperature probe misplaced or dislodged (common)

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

Patient Temperature 1 probe disconnected or out of range patient safety

Patient Temperature 1 reading outside lower limits of display range in Automatic Mode. System changes to Stop Mode. Audio alarm half-second tone every 10 seconds, Alarm/Alert indicator flashing.

Ranked causes

1. Temperature probe dislodged, disconnected, or cable wet/damaged (common)

First check

Verify probe placement on patient

Test point: Patient temperature probe site
Expected: Probe secure and in proper contact with patient

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

Patient Temperature 2 above user-defined limit patient safety

Patient Temperature 2 reading equal to or greater than user-set threshold. Current Mode continues. Audio alarm half-second tone every 2 minutes, Alarm/Alert indicator flashing.

Ranked causes

1. Temperature setpoint too low or patient overheating (common)

First check

Verify patient temperature from independent source

Test point: Patient monitor or thermometer
Expected: Confirm actual patient temperature

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

Patient Temperature 2 below user-defined limit patient safety

Patient Temperature 2 reading equal to or less than user-set threshold. Current Mode continues. Audio alarm half-second tone every 2 minutes, Alarm/Alert indicator flashing.

Ranked causes

1. Temperature setpoint too high or patient cooling (common)

First check

Verify patient temperature from independent source

Test point: Patient monitor or thermometer
Expected: Confirm actual patient temperature

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

Patient Temperature 2 high in Automatic Mode patient safety

Patient Temperature 2 reading above 39.5°C (103.1°F) and water temperature above 39.5°C (103.1°F), system unable to cool. System changes to Stop Mode. Audio alarm half-second tone every 10 seconds, Alarm/Alert indicator flashing.

Ranked causes

1. Inadequate cooling capacity, blocked vents, or cooling system failure (common)

First check

Confirm high patient temperature from independent source

Test point: Patient monitor or external thermometer
Expected: Patient Temperature 2 reading >= 39.5°C confirmed

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

Patient Temperature 2 high in Manual Mode patient safety

Patient Temperature 2 reading above 39.5°C (103.1°F) and water temperature above 39.5°C (103.1°F), system unable to cool in Manual Mode. Current Mode continues. Audio alarm half-second tone every 2 minutes, Alarm/Alert indicator flashing.

Ranked causes

1. Manual Water Target Temperature set too high, inadequate cooling, or blocked vents (common)

First check

Inspect machine side vents for blockage

Test point: Side vents of Arctic Sun 2000
Expected: Vents open and clear

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

Patient Temperature 2 low in Automatic Mode patient safety

Patient Temperature 2 reading below 31.0°C (87.8°F) and water temperature below 31.0°C (87.8°F), system unable to heat. System changes to Stop Mode. Audio alarm half-second tone every 10 seconds, Alarm/Alert indicator flashing.

Ranked causes

1. Inadequate heating capacity or heating system failure (common)

First check

Confirm low patient temperature from independent source

Test point: Patient monitor or external thermometer
Expected: Patient Temperature 2 reading <= 31.0°C confirmed

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

Patient Temperature 2 low in Manual Mode patient safety

Patient Temperature 2 reading below 31.0°C (87.8°F) and water temperature below 31.0°C (87.8°F), system unable to heat in Manual Mode. Current Mode continues. Audio alarm half-second tone every 2 minutes, Alarm/Alert indicator flashing.

Ranked causes

1. Manual Water Target Temperature set too low (common)

First check

Adjust Water Target Temperature upward

Test point: Water Target Temperature setting in Manual Mode
Expected: Setting increased from current value

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

Patient Temperature 2 probe disconnected or out of range patient safety

Patient Temperature 2 reading outside lower limits of display range in Automatic Mode. System changes to Stop Mode. Audio alarm half-second tone every 10 seconds, Alarm/Alert indicator flashing.

Ranked causes

1. Temperature probe dislodged, disconnected, or cable wet/damaged (common)

First check

Verify probe placement on patient

Test point: Patient temperature probe site
Expected: Probe secure and in proper contact

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

Patient temperature above user-defined limit patient safety

Patient temperature reading exceeds user-configured high threshold

Ranked causes

1. Patient temperature exceeds configured limit (common)

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

Patient temperature and water temperature high patient safety

Both patient and water above 38C in manual mode, cooling ineffective

Ranked causes

1. Cooling system ineffective in manual mode (occasional)

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

Patient temperature and water temperature low patient safety

Both patient and water below 32C in manual mode, heating ineffective

Ranked causes

1. Heating system ineffective in manual mode (occasional)

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

Patient temperature below user-defined limit patient safety

Patient temperature reading below user-configured low threshold

Ranked causes

1. Patient temperature below configured limit (common)

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

Patient temperature calibration error patient safety

Internal temperature calibration not functioning

Ranked causes

1. Calibration circuit malfunction (occasional)

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

Patient Temperature calibration error in Automatic Mode patient safety

Internal temperature calibration from Patient Temperature 1 probe input not functioning in Automatic Mode. System changes to Stop Mode. Audio alarm half-second tone every 10 seconds, Alarm/Alert indicator flashing. Patient temperature displayed as three dashes.

Ranked causes

1. Probe or internal calibration circuit failure (rare)

First check

Attempt restart in Manual Mode

Test point: System operation mode
Expected: System operates in Manual Mode with dashes for patient temperature

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

Patient Temperature calibration error in Manual Mode patient safety

Internal temperature calibration from Patient Temperature 1 probe input not functioning in Manual Mode. Current Mode continues. Audio alarm half-second tone every 2 minutes, Alarm/Alert indicator flashing. Patient temperature displayed as three dashes.

Ranked causes

1. Probe or internal calibration circuit failure (rare)

First check

Verify probe placement and connection

Test point: Temperature probe location and connector
Expected: Probe secure and properly positioned

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

Patient temperature out invalid patient safety

Patient Temperature Out calibration data in non-volatile memory invalid. Current Mode continues. Audio alarm half-second tone every 2 minutes. Alarm/Alert indicator flashing.

Ranked causes

1. Invalid calibration data (rare)

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

Patient temperature out system error patient safety

Calculated Patient Temperature Out differs 0.1°C from measured Patient Temperature 1 (primary patient temperature). Current Mode continues. Audio alarm half-second tone every 2 minutes. Alarm/Alert indicator flashing.

Ranked causes

1. Patient temperature calculation error (rare)

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

More symptoms

Prolonged cold exposure
Purge cycle incomplete
Reservoir level below minimum after pad purge
System continuous rebooting
System cooling with low patient temperature
System unable to maintain stable water temperature
System warming with elevated patient temperature
Temperature probe 1 malfunction
Unable to obtain stable patient temperature for Automatic control
User interface disconnect
User interface disconnect from monitor
User settings not saved
Water jets from Main Tank Vent in Purge Mode
Water reservoir level below minimum
Water reservoir level low
Water spills from Main Tank Vent in Manual or Automatic modes
Water temperature above safety level
Water temperature below safety level
Water temperature decreases during warming in Automatic Mode before reaching target
Water temperature high
Water temperature high at 42.5°C threshold
Water temperature increases during cooling in Automatic Mode before reaching target
Water temperature low

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

Error codes

Code	Meaning	Trigger	Severity
`01`	Low fluid pressure in lines	Patient line is open to air, leaking, or has significant air in line	warning
`02`	Low water flow to pads	Flow to pads decreased >50% from maximum during case or since last low flow alert, or flow <0.3 L/min (300 ml/min)	warning
`03`	Water reservoir level low	Reservoir fluid level almost empty, only enough for one procedure remaining	warning
`04`	Water reservoir level below minimum	Reservoir empty or below minimum level	critical
`05`	Water reservoir level below minimum, fill or purge	Reservoir level is empty or below minimum to run system	critical
`07`	Purge not complete, pads may contain extra water	Significant amount of water still being returned from pads at end of purge cycle	warning
`08`	System warming and Patient Temperature 1 high	Patient Temperature 1 reading above 39.5°C (103.1°F) and water temperature above 39.5°C (103.1°F) and system unable to cool in Automatic Mode	critical
`09`	Patient Temperature 1 above user-defined limit	Patient Temperature 1 reading equal to or greater than user-set threshold	warning
`10`	System cooling and Patient Temperature 1 low	Patient Temp 1 below 31.0°C (87.8°F) and water temp below 31.0°C (87.8°F) in Automatic Mode, unable to heat	error
`11`	Patient Temperature 1 below user-defined limit	Patient Temperature 1 reading equal to or less than user-set threshold	warning
`12`	Patient and water temperature high in Manual Mode	Patient Temp 1 above 39.5°C (103.1°F) and water temp above 39.5°C (103.1°F), unable to cool	warning
`13`	Patient and water temperature low in Manual Mode	Patient Temp 1 below 31.0°C (87.8°F) and water temp below 31.0°C (87.8°F), unable to heat	warning
`14`	Patient temperature 1 probe disconnected or out of range	Temperature 1 reading outside lower display limits in auto mode	critical
`15`	Unable to obtain stable patient temperature for Automatic control	Patient temperature discontinuity; significant change in reading for >10 minutes	error
`16`	Temperature probe 1 malfunction. Replace temperature probe or cable	Patient Temperature 1 reading outside high limit of display range in Automatic Mode	error
`17`	Patient Temperature calibration error. Restart system. (Automatic Mode)	Internal temperature calibration from Patient Temperature 1 probe not functioning in Automatic Mode	error
`18`	Patient Temperature calibration error. Restart system. (Manual Mode Alert)	Internal temperature calibration from Patient Temperature 1 probe not functioning in Manual Mode	warning
`19`	Patient Temperature calibration error. Restart system. (Automatic Mode Alarm 2)	Internal temperature calibration from Patient Temperature 1 probe not functioning in Automatic Mode	error
`20`	Patient Temperature calibration error. Restart system. (Manual Mode Alert 2)	Internal temperature calibration from Patient Temperature 1 probe not functioning in Manual Mode	warning
`21`	Patient Temperature 2 high in Automatic Mode	Patient Temp 2 above 39.5°C (103.1°F) and water temp above 39.5°C (103.1°F), unable to cool	error
`22`	Patient Temperature 2 above user-defined limit	Patient Temperature 2 reading equal to or greater than user-set threshold	warning
`23`	Patient Temperature 2 low in Automatic Mode	Patient Temp 2 below 31.0°C (87.8°F) and water temp below 31.0°C (87.8°F), unable to heat	error
`24`	Patient Temperature 2 below user-defined limit	Patient Temperature 2 reading equal to or greater than user-set threshold (likely typo in source)	warning
`25`	System is warming and Patient Temperature 2 high in Manual Mode	Patient Temp 2 above 39.5°C (103.1°F) and water temp above 39.5°C (103.1°F), unable to cool	warning
`26`	System is cooling and Patient Temperature 2 low in Manual Mode	Patient Temp 2 below 31.0°C (87.8°F) and water temp below 31.0°C (87.8°F), unable to heat	warning
`27`	Patient Temperature 2 probe disconnected or out of range	Patient Temperature 2 reading outside lower limits of display range in Automatic Mode	error
`28`	Temperature probe 2 malfunction. Replace temperature probe or cable	Patient Temperature 2 reading outside upper limits of display range in Automatic Mode	error
`29`	Patient Temperature 2 calibration error. Restart system. (Automatic Mode Alert)	Internal temperature calibration from Patient Temperature 2 probe not functioning in Automatic Mode	warning
`30`	Patient Temperature 2 calibration error. Restart system. (Manual Mode Alert)	Internal temperature calibration from Patient Temperature 2 probe not functioning in Manual Mode	warning
`31`	Patient Temperature 2 calibration error. Restart system. (Automatic Mode Alert 2)	Internal temperature calibration from Patient Temperature 2 probe not functioning in Automatic Mode	warning
`32`	Patient temperature 2 calibration error. Restart system. (Manual Mode Alert 2)	Internal temperature calibration from Patient Temperature 2 probe not functioning in Manual Mode	warning
`33`	Water temperature high. Allow system to cool. (44.0°C threshold)	Water temperature above 44.0°C (111.2°F)	error
`34`	Water temperature high	Water temperature above 42.5°C (108.5°F)	unknown
`35`	Water temperature low. Allow system to warm. (3.5°C threshold)	Water temperature below 3.5°C (38.3°F)	error
`36`	Water temperature above safety level. Allow system to cool.	Water temperature above 44°C (111.2°F)	critical
`37`	Water temperature above safety level	Water temperature exceeds 43°C (109.4°F)	critical
`38`	Water temperature below safety level	Water temperature drops below 3.0°C (37.4°F)	critical
`40`	System unable to maintain stable water temperature	In Manual Mode, system unable to control water within 1.0°C of setpoint after 25 minutes in current mode or at time of last temperature change	unknown
`41`	Low bypass flow. Heating not available.	Insufficient internal flow during priming or bypass mode	unknown
`43`	User settings not saved. System default settings restored.	Saved customer user profile settings are invalid	unknown
`44`	Invalid system log entry. Service information may be corrupt.	In Diagnostic Mode, one or more entries in internal system event log are invalid	unknown
`45`	AC power lost	AC power was previously lost while power switch was in ON position	warning
`46`	User interface disconnect	User interface not detected by control system	error
`46`	Non-recoverable system error. User interface not detected.	User interface not detected by control system	unknown
`47`	Non-recoverable system error. User interface not detected.	User interface not detected by monitor system	unknown
`47`	User interface disconnect from monitor	User interface not detected by monitor system	error
`48`	Patient temperature output invalid	Patient Temperature Output (Echo) calibration data in non-volatile memory is invalid	unknown
`49`	Patient temperature out system error	Calculated Patient Temperature Out differs 0.1°C from measured Patient Temperature 1	error
`50`	Patient temperature 1 erratic	Significant change in patient temperature reading for more than 8 minutes	warning
`51`	Patient temperature 1 below control range	Patient temperature less than 31°C when Automatic mode entered	warning
`52`	Extended period of cold water delivery	Circulating water temperature below 10°C/50°F for 8 of previous 10 hours	error
`53`	Prolonged cold exposure	Arctic Sun has issued 11 alerts for extended periods of cold water delivery	critical
`54`	Manual mode disabled	Manual key pressed while Manual Mode is disabled	error
`60`	Non-recoverable system error. Control and Monitor start-up synchronization fault.	Control and Monitor start up synchronization fault	unknown
`60-99`	Non-recoverable system error	System error that cannot be managed without Medivance support	critical
`61`	Non-recoverable system error. Control Processor parameter memory fault.	Control Processor parameter memory fault	unknown
`62`	Non-recoverable system error. Monitor Processor parameter memory fault.	Monitor Processor parameter memory fault	unknown
`64`	Non-recoverable system error. Unable to enable pump power (Control).	Unable to enable pump power (Control)	unknown
`65`	Non-recoverable system error. Unable to enable pump power (Monitor).	Unable to enable pump power (Monitor)	unknown
`66`	Non-recoverable system error. Unable to disable pump power (Control).	Unable to disable pump power (Control)	unknown
`67`	Non-recoverable system error. Unable to disable pump power (Monitor).	Unable to disable pump power (Monitor)	unknown
`70`	Non-recoverable system error. Mains signal is missing or inconsistent.	Mains signal is missing or inconsistent	unknown
`71`	Non-recoverable system error. T2 Thermistor signal out of range - high resistance.	T2 Thermistor signal out of range - high resistance	unknown
`72`	Non-recoverable system error. T2 Thermistor signal out of range - low resistance.	T2 Thermistor signal out of range - low resistance	unknown
`73`	Non-recoverable system error. T1 Thermistor signal out of range - high resistance.	T1 Thermistor signal out of range - high resistance	unknown
`74`	Non-recoverable system error. T1 Thermistor signal out of range - low resistance.	T1 Thermistor signal out of range - low resistance	unknown
`75`	Non-recoverable system error. T3 Thermistor signal out of range - high resistance.	T3 Thermistor signal out of range - high resistance	unknown
`76`	Non-recoverable system error. T3 Thermistor signal out of range - low resistance.	T3 Thermistor signal out of range - low resistance	unknown
`77`	Non-recoverable system error. T4 Thermistor signal out of range - high resistance.	T4 Thermistor signal out of range - high resistance	unknown
`78`	Non-recoverable system error. T4 Thermistor signal out of range - low resistance.	T4 Thermistor signal out of range - low resistance	unknown
`79`	Non-recoverable system error	T1 and T2 temperature sensors differ by more than 1.0 degree C	critical
`80`	Non-recoverable system error	Control Processor failed to detect simulated water temperature fault	critical
`81`	Non-recoverable system error	Monitor Processor failed to detect simulated water temperature fault	critical
`82`	Non-recoverable system error	A/D converter fault	critical
`83`	Non-recoverable system error	Monitor Processor does not communicate	critical
`84`	Non-recoverable system error	Control Processor does not communicate	critical
`85`	Non-recoverable system error	Control Module model could not be verified	critical
`86`	Non-recoverable system error	Power supply voltage out of range	critical
`98.x`	Non-recoverable system error	Processor fault	critical
`99`	Non-recoverable system error	Processor Fault	critical

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ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.