Rinnai REU-2007W, Service Manual

Page: 41 / 69

Infinity REU-2007,2008,2408,2424 - 36 - ©Rinnai
)*24
Before carrying out checks marked #, remove power cord from wall plug.
Wiring diagram is on page 35.
Appliance will to operate (even remote control fails to operate)
1) Is the fuse blown?
Fuses are located in plastic holders in
the main harness, on the lower right
hand side of the appliance
Check fuse
a. Remove 240V plug from socket.
b. # Measure resistance to check the electric
fuse (3A).
Normal: less than 1
If normal, proceed to check item 2) below.
Faulty: Replace fuse (5A)
If it blows again, investigate cause of short
circuit.
2) Is the main transformer normal?
Check the transformer.
a. Measure the voltage in between the red
wires of the relay connector (A
1
).
Normal: AC90 ~ 110 V / 15 ~ 21
If normal, check 2 below.
Faulty: Check for AC 90 ~ 110 V on the
PCB terminal J
black ~ black
b. Check voltages below at upper PCB
connector A.
Normal: orange -orange
AC 13 ~ 30V / 1.4 ~ 1.8
brown - grey
AC 30 ~ 50V / 6 ~10
yellow - grey
AC 180 ~ 220V / 0.4 ~ 0.6
If normal, check 3 at top of next page.
Faulty: Replace the transformer.
Ω
Ω
Ω
Ω
Ω