Heater Relay- 1.0.3 Isolate Heater Off Logic; Heater Relay- 1.0.4 Heater Switch Off But "Heater Relay Test Rail" Reoccurs; Heater Relay- 1.0.5 Heater Relay Test Fail Reoccurs - Fresenius Medical Care 2008K2 Troubleshooting Manual

Yes
No "HEATER RELAY TEST FAIL" did NOT reoccur! See procedure number

HEATER RELAY- 1.0.3 ISOLATE HEATER OFF LOGIC

a) Turn the machine OFF!
IMPORTANT!
b) Turn the HEATER Switch off!
c) Turn the machine on AND return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM').
d) Does "HEATER RELAY TEST FAIL" reoccur?
Yes "HEATER RELAY TEST FAIL" reoccurs! ENSURING the Heater Switch was off, see
procedure number
No "HEATER RELAY TEST FAIL" did NOT reoccur! See parts a AND b below:
IMPORTANT!
a)
b) CAREFULLY repeat (ABOVE) procedure number
HOWEVER, if you return here see procedure number
HEATER RELAY- 1.0.4 HEATER SWITCH OFF BUT "HEATER RELAY TEST FAIL" REOCCURS
IMPORTANT!
a) Leave the Heater Switch off until the problem is located!
b) Turn the machine off and swap in a known good Power Logic Board. To LOCATE the board refer to
Figure 4A (page 9).
c) Return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM'). If (and ONLY if) "HEATER
RELAY TEST FAIL" reoccurs see procedure number
reoccur the new Power Logic board solved the problem!

HEATER RELAY- 1.0.5 HEATER RELAY TEST FAIL REOCCURS

NOTE: The previous Power Logic Board is probably okay.
a) Turn the machine off. THREE (3) possibilities (see COMPONENT LIST below). Swap each in, one at a
time then in between, see part b to see if the new component fixed the problem.
COMPONENT LIST: 1) Power Control board (inside the power supply); 2) Functional Board (to prevent
"Cond Offset Failure", place the machine into T and C Mode (refer to
Error! Bookmark not defined.));
3) Motherboard.
b) Turn the machine on and return to Dialysis Program ("Select Program" → 'Dialysis' → 'CONFIRM'). If
"HEATER RELAY TEST FAIL" reoccurs swap in the next component in the list "HEATER RELAY TEST
FAIL" does NOT occur.
"HEATER RELAY TEST FAIL" reoccurs! See procedure number
HEATER RELAY- 1.0.3
HEATER RELAY- 3.0.0
HEATER RELAY- 1.0.4
Turn the Heater Switch on!
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
(page 578).
page 583
( ).
(page 578).
HEATER RELAY- 1.0.2
HEATER RELAY- 3.0.0
HEATER RELAY- 1.0.5
(page 577)
page 583
(
(page 578). If it does not
OPERATING MODES, page
).
Page 578