Fresenius Medical Care 2008K Troubleshooting Manual page 123

Yes NOTE the page and procedure number in case you need to return here:
a) Proceed to page 238,
b) If a balancing chamber diaphragm leak is NOT located see procedure number
No Proceed to page 190,
T- 7.0.0 CHECK TEMPERATURE SENSOR
WARNING! Before entering Service Mode it is critical that the machine is NOT issuing a "No
Water" alarm, loading pressure is good, and the machine is TOTALLY free Flow Errors (debug
screen 1, Flow Error = 0 (constant). Alarm banners do NOT occur in Service mode!
This is NOT a routine Temperature Sensor Calibration! Follow these procedures carefully to
avoid error!
a) Enter Service Mode
performing this calibration. Read both then proceed with the Temp Sensors calibration:
1. The [Pre-Temperature Reference] data box value should increase with each resistor plug per
18 (page 121) if (and ONLY if) the CORRECT resistor plug is used AND the Temperature
monitoring circuit is working properly otherwise an "Operator Error" message occurs.
2. After installing each resistor plug and BEFORE pressing the 'CONFIRM' key, the [Pre-Temperature
Reference] data box value should NOT vary more than +/- 2.
Table 18 - Pre Temperature Reference Values
First Resistor: 34° C = 6.808 K
Pre-Temperature Reference value = 70 +/- 6
Second Resistor: 41° C = 5.117 K
Pre-Temperature Reference value = 163 +/- 6
b) Were both of the above checks for all four resistor plugs okay?
Yes Press the 'CONFIRM' key twice to save the calibration then see procedure number
7.0.2 (page 122).
No NOTE which checks were not okay then see procedure number
T- 7.0.1 TROUBLESHOOT TEMPERATURE SENSOR
a) Turn the machine off and back on. IMPORTANT! Two checks while CAREFULLY repeating the TEMP
SENSORS calibration:
1. ASSURE the CORRECT resistor plugs are installed at distribution board position labeled "MON-
nd
2
NTC" ( position from the left) AND in the CORRECT order as prompted on the screen (see
also Table 18, page 121).
2. ASSURE that the 'CONFIRM' key was pressed before placing the next resistor plug.
b) Did the NOTED problem(s) reoccur when repeating the calibration?
Yes See procedure number
No See procedure number
SECTION 19 - TESTING FOR A LEAKING BALANCING
CHAMBER DIAPHRAGM
T- 7.0.0 (page 121).
SECTION 10 – PRESSURE TESTS
Calibrate Sensors Temp Sensors. IMPORTANT! Two checks while
T- 7.1.1 (page 125).
T- 7.0.2 (page 122).
Fresenius 2008K Troubleshooting Guide
P/N 507298 Rev. B (Draft 1)
Third Resistor: 80° C = 1.255 K
Pre-Temperature Reference value = 197 +/- 6
Fourth Resistor: 90° C = 0.915 K
Pre-Temperature Reference value = 210 +/- 6
T- 7.0.1
Section 4 – Temperature Problems
FAILING.
Table
T-
(page 121).
Page 121