Medivance Arctic Sun 2000, Service Manual

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39
Table 6. 3
General Troubleshooting Guide
Conditions / Symptom Observation Cause Solution
Power up in User Diagnostic
Mode. Operate the system in
Manual Mode with a water
target of 4°C for 5 minutes.
The chiller runs but T4
remains at or above room
temperature. Chiller fault. Call Medivance Service.
Power up in User Diagnostic
Mode. Operate the system in
Manual Mode with a water
target of 4°C for 5 minutes.
The cooling command (PWM-
Mxx) is nonzero and T4
stabilizes below 6C. Pump cable or
connection fault. Check the Mixing Pump
connection at the I/O Card. Verify
that the circuit card is not wet.
Reseat the connector. Allow the
card to dry, if necessary.
Power up in User Diagnostic
Mode. Operate the system in
Manual Mode with a water
target of 4°C for 5 minutes.
The cooling command (PWM-
Mxx) is nonzero and T4
stabilizes below 6C. The
Mixing Pump connection at
the I/O Card is dry and
secure. The Mixing Pump
internal filter is
clogged.
The pump head may
be ineffective due to
debris stuck in a valve
or the pump electronics
have failed.
Replace the Mixing Pump internal
filter.
Replace the Mixing Pump.
Power up in User Diagnostic
Mode. Operate the system in
Manual Mode with a water
target of 4°C for 5 minutes.
The cooling command is
nonzero and T4 stabilizes
below 6C. Mixing Pump
replacement ineffective. Electronics fault Call Medivance Service.
CTU connected.
Water does not cool to
target temperature in
Manual Mode.
Power up in User Diagnostic
Mode. Operate the system in
Manual Mode with a water
target of 4°C for 5 minutes,
the cooling command is
nonzero and T4 changes little. Electronics or chiller
fault. Call Medivance Service.
Water drained from system
appears green Highly alkaline tap
water used at some
point to fill system.
Causes chelating of
copper ion from chiller
evaporator. Drain and only use distilled or
sterile water to fill the system.
Pads do not empty well during
purge cycle. A "click" is
heard when the purge is
initiated. Vent line is kinked Inspect vent line which is small
diameter line exiting the bottom of
the Inlet/Outlet Manifold and
entering top of tank. Replace if
kinked. Pads connected.
System fails to purge
completely.
Pads do not empty well during
purge cycle. A "click" is
heard when the purge is
initiated. Water has
inadvertently entered
purge line or valve. Repeat purge multiple times to
attempt to clear water. If
necessary, detach one end and
drain.