P- A.4.0 Isolate "Heater Circuit" - Fresenius Medical Care 2008K2 Troubleshooting Manual

P- A.4.0 ISOLATE 'HEATER CIRCUIT'
CAUTION!
a) Turn the machine OFF! Electrocution hazard if NOT turned off!
b) Figure right, at the Distribution board's Heater
Connector, TWO (2) checks:
Check #1: TOP: From right-to-left, wires MUST be
brown (hot), Blue (neutral),
Green/yellow stripped (ground).
Check #2: BOTTOM: From right-to-left, wires
c) From the BOTTOM of the Heater Connector DISCONNECT: If a US Heater the brown wire OR if a
German Heater the black wire.
IMPORTANT! Turn the Heater Breaker Switch
d)
on!
e) If possible turn the machine on (fan running).
f) If possible place the machine in Heat Disinfect then allow up to thirty (30) minutes.
g) Does the GFI 'blow' again?
Yes GFI 'blows' again! FOUR (4) possible bad components: 1) Bad Fan OR; 2) Bad Power
Control board (inside the power supply) OR; 3) Bad power supply (or power cord / plug) OR;
4) Bad distribution board.
No Does NOT 'blow' again! Perform parts a THROUGH c below:
a) Replace the heater. To LOCATE the heater refer to
b) After replacing the heater turn the Heater Switch on.
c) From Dialysis Program OR Heat Disinfect if the GFI 'blows' again the fan or the power
supply may be bad.
MUST be brown, blue,
green/yellow stripped (US
Heater) OR black, white,
green (German Heater).
2008K/K2 Troubleshooting Guide
P/N 507298 Rev. H
Figure 28 (page 129).
Page 596