Skytron 1700: troubleshooting and error codes

Back Section function moves improperly patient safety

Back section up/down function fails to respond, moves slowly, or does not reach target position

Ranked causes

1. 1. Incorrect Speed Adjustment (unknown)
2. 2. Spool Valve Not Centered (unknown)
3. 3. Bad Check Valves (unknown)
4. 4. Low on Oil (common)
5. 5. Pinched Hose (occasional)
6. 6. Defective Mini-Valve (unknown)
7. 7. Pressure Relief Valve Not Set Properly (unknown)
8. 8. Bad Solenoid (unknown)
9. 9. Defective Relay Box or Pendant Control (occasional)

Lateral tilt function moves improperly patient safety

Lateral tilt left/right function fails to respond, moves slowly, or does not reach target position

Ranked causes

1. 1. Incorrect Speed Adjustment (unknown)
2. 2. Spool Valve Not Centered (unknown)
3. 3. Bad Check Valves (unknown)
4. 4. Low on Oil (common)
5. 5. Pinched Hose (occasional)
6. 6. Defective Mini-Valve (unknown)
7. 7. Pressure Relief Valve Not Set Properly (unknown)
8. 8. Bad Solenoid (unknown)
9. 9. Defective Relay Box or Pendant Control (occasional)

Leg function moves improperly patient safety

Leg section up/down function fails to respond, moves slowly, or does not reach target position

Ranked causes

1. 1. Incorrect Speed Adjustment (unknown)
2. 2. Spool Valve Not Centered (unknown)
3. 3. Bad Check Valves (unknown)
4. 4. Low on Oil (common)
5. 5. Pinched Hose (occasional)
6. 6. Defective Mini-Valve (unknown)
7. 7. Pressure Relief Valve Not Set Properly (unknown)
8. 8. Bad Solenoid (unknown)
9. 9. Defective Relay Box or Pendant Control (occasional)

Trendelenburg function moves improperly patient safety

Trendelenburg head-up/down function fails to respond, moves slowly, or does not reach target position

Ranked causes

1. 1. Incorrect Speed Adjustment (unknown)
2. 2. Spool Valve Not Centered (unknown)
3. 3. Bad Check Valves (unknown)
4. 4. Low on Oil (common)
5. 5. Pinched Hose (occasional)
6. 6. Defective Mini-Valve (unknown)
7. 7. Pressure Relief Valve Not Set Properly (unknown)
8. 8. Bad Solenoid or Wiring (unknown)
9. 9. Defective Relay Box or Pendant Control (occasional)

Brakes will not set properly patient safety

Brake function fails to engage or does not hold table in locked position

Ranked causes

1. 1. Emergency Brake Release Valve Open or Defective (common)
2. 2. Spool Valve Not Centered (unknown)
3. 3. Bad Check Valve (unknown)
4. 4. Low on Oil (common)
5. 5. Pressure Relief Valve Not Set Properly (unknown)
6. 6. Pinched Hose (occasional)
7. 7. Defective Mini-Valve (unknown)
8. 8. Defective Relay Box or Pendant Control (occasional)

Brakes will not retract properly patient safety

Brake release function fails to fully retract brake cylinders or does not respond to brake unlock command

Ranked causes

1. 1. Incorrect Speed Adjustment (unknown)
2. 2. Bad Check Valve (unknown)
3. 3. Spool Valve Not Centered (unknown)
4. 4. Defective Mini-Valve (unknown)
5. 5. Pinched Hose (occasional)
6. 6. Defective Solenoid or Wiring (unknown)
7. 7. Defective Relay Box or Pendant Control (occasional)

Table will not elevate properly patient safety

Elevation function fails to raise table to desired height or does not respond to up command

Ranked causes

1. 1. Pressure Relief Valve Not Set Properly (unknown)
2. 2. Low on Oil (common)
3. 3. Spool Valve Not Centered (unknown)
4. 4. Defective Pump (rare)
5. 5. Defective Mini-Valve (unknown)
6. 6. Defective Solenoid or Wiring (unknown)
7. 7. Defective Relay Box or Pendant Control (occasional)

Table will not descend properly patient safety

Elevation function fails to lower table or does not respond to down command

Ranked causes

1. 1. Incorrect Speed Adjustment (unknown)
2. 2. Bad Check Valve (unknown)
3. 3. Spool Valve Not Centered (unknown)
4. 4. Galled Slider Assembly (rare)
5. 5. Defective Solenoid or Wiring (unknown)
6. 6. Defective Relay Box or Pendant Control (occasional)

Back Section function chatters or loses position patient safety

Back section function vibrates, makes noise, or does not hold set position

Ranked causes

1. 1. Defective or Dirty Check Valves (common)
2. 2. Oil Leakage in Circuit (common)
3. 3. Air Inside Cylinder (occasional)
4. 4. Pinched Hose (occasional)
5. 5. Low on Oil (common)

Lateral tilt function chatters or loses position patient safety

Lateral tilt function vibrates, makes noise, or does not hold set position

Ranked causes

1. 1. Defective or Dirty Check Valves (common)
2. 2. Oil Leakage in Circuit (common)
3. 3. Air Inside Cylinder (occasional)
4. 4. Pinched Hose (occasional)
5. 5. Low on Oil (common)

Leg function chatters or loses position patient safety

Leg section function vibrates, makes noise, or does not hold set position

Ranked causes

1. 1. Defective or Dirty Check Valves (common)
2. 2. Oil Leakage in Circuit (common)
3. 3. Air Inside Cylinder (occasional)
4. 4. Pinched Hose (occasional)
5. 5. Low on Oil (common)

Trendelenburg function chatters or loses position patient safety

Trendelenburg function vibrates, makes noise, or does not hold set position

Ranked causes

1. 1. Defective or Dirty Check Valve (common)
2. 2. Oil Leakage in Circuit (common)
3. 3. Air Inside Cylinder (occasional)
4. 4. Pinched Hose (occasional)
5. 5. Low on Oil (common)

Brakes will not stay locked patient safety

Brakes lose pressure or unlock after being set

Ranked causes

1. 1. Emergency Brake Release Valve Open or Defective (common)
2. 2. Defective or Dirty Check Valve (common)
3. 3. Oil Leakage in Circuit (common)
4. 4. Leaking O-Ring Inside Cylinder (occasional)

Motor does not run when pendant button pressed high voltage

Motor/pump assembly fails to start when corresponding pendant control button is pressed

Ranked causes

1. 1. No voltage at motor connector (common)
2. 2. Capacitor shorted or grounded (rare)
3. 3. Motor windings defective or open (occasional)
4. 4. Problem in wires, connectors, relay box, or main switch (occasional)

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

Table loses elevation patient safety

Table descends gradually or suddenly after reaching desired height without operator input

Ranked causes

1. 1. Bad Check Valve (common)
2. 2. Leaking Mini-Valve (unknown)
3. 3. Loose Fittings, Joints, Hoses (common)
4. 4. Leaking O-Ring Inside Cylinder (occasional)

Main power not reaching table high voltage

Line voltage (120 VAC) not present at relay box connector CN4 pins 1 and 2

Ranked causes

1. 1. Defective wires or connectors (common)
2. 2. Defective main switch (occasional)
3. 3. Blown fuses (common)

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

Solenoid does not function when pendant button pressed high voltage

Brake locking solenoid or control solenoid fails to activate when the corresponding pendant control button is pressed

Ranked causes

1. 1. No voltage at solenoid connector (common)
2. 2. Defective solenoid coil (occasional)
3. 3. Problem in wires, connectors, relay box, or pendant control (occasional)

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

Pendant control communication test

Verify pendant control communicates with relay box (cannot be tested without specialized equipment)

Ranked causes

1. 1. Defective pendant control circuit board (rare)
2. 2. Defective relay box microprocessor (rare)

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

Relay box input/output verification high voltage

Verify relay box receives input power and provides output voltage to pump and solenoids

Ranked causes

1. 1. Defective relay box (occasional)
2. 2. Loose or bad connector (common)

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

Solenoid output verification high voltage

Verify relay box provides 120 VAC output to solenoid coils on mini-valves for all functions

Ranked causes

1. 1. Defective relay box (occasional)
2. 2. Loose or corroded connector pins (common)

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

Main power circuit connectivity test

Verify wiring harness continuity from pendant base connector to relay box connector CN7

Ranked causes

1. 1. Broken wire in harness (rare)

Motor thermal protector activated caution

Motor field windings thermal protector opens after approximately 10 minutes of continuous operation and requires reset time

Ranked causes

1. 1. Normal thermal protection operation (common)

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

Solenoid thermal fuse blown caution

Solenoid internal thermal fuse opens after approximately 7 minutes of continuous operation and solenoid must be replaced

Ranked causes

1. 1. Thermal fuse activated by continuous solenoid operation (common)

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