Van Air Systems Sentinel MDV-400I Series Drain Valves - Manual (Page 4)

PAGE 4
Note: Service work to be done by qualifi ed personnel only! Always remove pressure and power from the unit before servicing.
TROUBLE SHOOTING
PROBLEM CAUSES SOLUTION
Unit will not operate (Power
On LED is not lit) No power
Check power supply. Check circuit breakers or fuses. Check to see if circuit has a remote
power on/off switch.
Fuse F1 is blown Replace Fuse F1.
Unit will not operate (Power
On LED is lit)
Fuse F2 is blown
Turn power off and back on. Press the Push to Test button. If valve does not rotate, fuse
labeled F2 on bottom board is blown. Replace fuse.
The control board did
not sense that the
next position, closed
or open, was reached
for a period of 15
seconds
If the valve rotates several rotations and then randomly stops, press the Push To Test But-
ton. If the valve repeats the fault, the optic sensor has failed (consult factory). If the valve
rotates back to closed, the fault was corrected and the unit is running correctly.
Faulty actuator/motor/
valve assembly
Press the Push To Test Button. If the actuator motor turns but the valve does not, check
for a broken or loose valve stem. If the stem is broken, replace the valve. If this is not the
problem, replace the entire unit. If the motor will not turn after power is applied directly to it,
the motor has failed and the unit must be replaced.
Valve binds during rotation
Ball valve seats worn Replace the ball valve. Ball valve should be replaced at some time between 100,000 and
150,000 cycles (will vary with application).
Ball valve ball clogged
or damaged
Free valve of any debris. If valve is damaged, replace.
Ball valve leaks prematurely Defective ball valve Replace ball valve.
Valve position is opposite
of where it should be in the
sequence
Power Interruption Press the Push to Test button. Valve will rotate to the closed position.
Valve operates at other than
set times
Power interruption
durring cycle
Settings changed with
power on
Valve will continue on set time once power is restored from the point power was inter-
rupted.
Remove power and adjust timer to desired settings. See SECTION 3.0
4.0 PUSH TO TEST BUTTON
4.1 Must be pressed after timer change to initialize new setting.
4.2 If depressed and released, the valve will cycle one time.
4.3 If depressed and held, the valve will stay open until released.
5.0 REQUIRED MAINTENANCE
Periodically check the valve for the following:
5.1
Press the Push to Test button to verify valve rotation. Valve should rotate back to closed position.
5.2 Check actuator to valve connection area for debris which could impede proper operation.
5.3 Check wires and/or electrical connections for signs of damage.
5.4 Check valve for leaks. If leaks are present, remove pressure from the system and replace the ball valve.
5.5 Check fasteners for tightness.
2950 Mechanic Street
Lake City, Pa 16423 USA
Phone: 800-840-9906
Fax: 814-774-0778
www.vanairsystems.com
VAN AIR PARTS AND SERVICE
PHONE: 888-606-9303
FAX: 814-774-0778
E-MAIL: [email protected]