Isolate Heater Resistance/Recirculation - Fresenius Medical Care 2008T Troubleshooting Manual

T- 3.0.2 ISOLATE HEATER RESISTANCE
Turn the HEATER Switch OFF!
a)
b) Confirm you set the volt meter to RESISTANCE (Ω).
c) Figure right, measure again at the Heater Connector,
between the BLUE and BROWN wires. TWO (2) possible
scenarios:
IF (and ONLY if) less than 8.0 Ω OR more
1)
than 13.0 Ω: ENSURING the HEATER
Switch was OFF before measuring, the
heater* is bad. * To LOCATE the heater, refer
to Figure 28 (page 140).
2) IF between 8.0 and 13.0 Ω: See parts a THROUGH c below:
Turn the HEATER Switch on!
a)
b) To prevent issues with Pre Rinse, allow the
screen's TOP [Remaining Prerinse Time]
window = 0:00
c) ENSURING the HEATER Switch is on AND [Remaining Prerinse Time] = 0:00, see
procedure number
T- 3.0.3 ISOLATE RECIRCULATION
When [Remaining Prerinse Time] = 0:00 drain Valve #30 closes and Valve #29 opens resulting in no
drain flow. If Valve #30 is sticking open Heat Disinfect can take a long time to reach 80° C!
a) Reference figure on right, if a 'Quick Connector'
is present at the end of the 'to drain tubing' an
adaptor is required.
b) Watching drain flow, allow forty five (45) seconds
THEN watch for thirty (30) seconds. TWO (2)
possible scenarios:
1) IF (and ONLY if) drain flow HAS stopped: This is normal! Reconnect the drain THEN see
procedure number
2) IF drain flow DID NOT stop: This may or may not cause this temperature problem but must be
fixed before continuing! Perform parts a through c below:
a) Turn the machine OFF and swap in a known good, Valve #30*. *To LOCATE Valve #30 refer to
Figure 35 (page 211).
b) Place the machine into RINSE until it finishes i.e.[Remaining Time] = 0:00.
c) Return to Heat Disinfect! ENSURING [Remaining Prerinse Time] = 0:00 is there drain flow
now (Yes or No)?
T- 3.0.3 (page 301).
T- 3.0.4
(page 302).
2008T Troubleshooting Guide
P/N 490292 Rev. A
Page 301