Infinity REU-VRM3237WG / HD250e REU-VRM3237WC - 26 - Issue 1 - 19/05/09 ©Rinnai
14. Anti-frost Heater Circuit (D
5
and D
6
)
a) Disconnect relay connector D
5
and measure resistance bewtween yellow wires on the
inlet valve frost heater at the frost heater side. Normal 53
. If normal proceed to b).
Faulty: Replace valve anti frost heater.
b) Disconnect relay connector D
6
and measure resistance between the yellow wires on
the pipe frost heater at the frost heater side. Normal 618
.
Faulty: Replace valve anti frost heater.
15. Frost Sensing Switch
Disconnect relay connector (D
4
) and measure resistance between yellow and yellow
wires. At room temperature resistance should be > 1M
. Cool switch to below 2 then
measure resistance. Resistance should be < 1M
. Faulty: Replace frost sensing
switch.
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