Medivance Arctic Sun 2000, Service Manual

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36
Table 6. 3
General Troubleshooting Guide
Conditions / Symptom Observation Cause Solution
Disconnect all pads from Fluid
Delivery Line. Enter Manual
Mode. The system does not
remain in bypass mode for at
least 3 minutes or “Alert 1"
occurs. There is an external or
internal leak in the
system of fluid line.
This observation rules
out leaks in the pad. Replace Fluid Delivery Line. Pads connected.
Low water flow or air
continuously streaming
from pads. The pump can
be heard.
Run in Manual Mode for 5
minutes with pads connected.
Place the pads on the floor
and then place the system in
Stop Mode. Dry all water
from the pads, lines and
manifold then place them on
the floor. Wait 5 minutes,
check carefully for water
leaking from the pads, lines or
valves. Water leaking under
positive pressure will
indicate the exact leak
site. Replace the leaking component.
Check the pads for folds or
buckles created during
placement. Pads folded or creased
foam-to-foam will
reduce flow
significantly. Smooth out and reapply pad to
remove buckles or creases. Pads connected.
Low water flow. The pump
can be heard.
Remove and inspect the
External Filter. With water
flowing, listen for hissing
sound at Inlet/Outlet Manifold. Filter may be clogged
with debris or the filter
fitting may not be tight. Clean or replace filter as needed
and tighten the fitting.
Power up in User Diagnostic
Mode. Enter Manual Mode
with a water target of 28°C.
After stabilizing for several
minutes, note whether the
display indicates:
•
2550 <= FL (flow) <=
3150
•
P = -6.7 to -7.2 (psi) If
value is less than 6.7
then the system is unable
to generate full negative
pressure.
•
Circulating Pump PWM is
greater than 200
indicating pump is
running faster than
normal to maintain flow
and pressure.
If the pressure cannot
be maintained, the flow
is low, or the PWM is
greater than 175, there
may be an external or
internal leak or debris
is caught in a pump
valve causing
inefficient pumping. Remove external filter fitting and
check o-rings for damage.
Debris may be cleared by running
the pump a full speed. To
attempt to dislodge debris,
replace the CTU with a fluid
delivery line and connect two
shunt tubes to the fluid delivery
line manifold. Enter Manual
Mode. The flow rate should
exceed 4 lpm for 5 minutes.
Remove the shunts and
reconnect the CTU. Repeat the
check of pump PWM.
No leak is found. Operate the
system as above. Pressure is
correct but flow is low. Filter may be clogged
with debris. Clean or replace Circulating
Pump internal filter as needed.
CTU connected.
Low water flow, low
pressure, or high PWM.
The pump can be heard.
No leak is found. Filter is
clean. Operate the system as
above. Circulating Pump
PWM is high. The pump head may
be ineffective due to
debris stuck in the
pump. Replace the Circulating Pump.