Heater Relay- 1.0.0 Isolate Intermittent Alarm; Section 23 - Heater Relay Test Fail - Fresenius Medical Care 2008K2 Troubleshooting Manual

This is NOT a Heater or Triac problem!
selecting 'Dialysis' then 'CONFIRM, the Function Board turns the heater circuit off using Heater Relay (RL3)
located on the Power Control board. If the Function Board receives a signal that heater current is present
during this period it issues a "HEATER RELAY TEST FAIL".
IMPORTANT! Turn the machine OFF!
A)
B) Figure below, being careful NOT to pull the 24V Power Harness loose, GENTLY open the card cage.
HARD
C) Push down
motherboard.
D) Close the card cage.
E) Figure right, ENSURE the Heater Switch is on!
F) See procedure number

HEATER RELAY- 1.0.0 ISOLATE INTERMITTENT ALARM

a) Turn the machine on and return to Dialysis Program ("Select Program"→ 'Dialysis' → 'CONFIRM')!
b) Does "HEATER RELAY TEST FAIL" reoccur?
Yes "HEATER RELAY TEST FAIL" reoccurs! Turn the machine OFF THEN see procedure
number
No "HEATER RELAY TEST FAIL" did NOT reoccur! Reseating the boards may have fixed the
problem HOWEVER, see procedure number
SECTION 23 – HEATER RELAY TEST FAIL
on the Power Logic and Functional Boards to ENSURE good connections to the
HEATER RELAY- 1.0.0
HEATER RELAY- 1.0.1
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
From "Select Program", for eight (8) seconds after
(page 576).
(page 577).
HEATER RELAY- 3.0.0
page 583
( ).
Page 576