Control Circuit Trouble Shooting; Transformer; Fuse - Teledyne EHE Installation And Operation Manual

Hi-E2
Figure 31. Wiring Diagram with Test Points.
such as air conditioning compressors or to an electric
utility company problem. Arrange for correction of the
voltage as appropriate.
4E-2. Control Circuit Trouble Shooting
The heater controls are in a 24V 60 Hz circuit
with operating and safety controls basically arranged
in a series circuit. Trouble shooting is done by probing
for voltage at various points in the circuit to determine
which component is preventing operation. Check points
are indicated on Figure 31. The recommended
procedure steps through the circuit in a sequential way,
but verifying voltage at any of the numbered points
confirms that all prior components are OK.
Experienced technicians may be able to shorten the
process by going directly to one of the intermediate test
points.
Electronic
Control
OFF
SPA POOL
PV
PSW
24V
MV
Remote Connector
BK
Limit
5
Pressure
Switch (Water)
Electrical
3 2
Fireman
Switch
Y Y/BK
Connection
Igniter
Venturi Pressure
Switch
6
Y/BK
Vent Limit Burner Limit
(MR)
(Single Use)
BR
9
10
Y
Gas Valve
Temp
Water
Temp
Sensor
4
Limit
W
1

Fuse

R
BK
W-R
11
W-BK
Y
R
Y
W
D
W
S120 IGN/120
F1
F2
L1
24V
E
L2
IND
IGN
S2
W
7
Ignition
PR
Control
TH
VAL
MVI
Fenwal
BR
GND
G
05-33
Y/BK
8
Y
4E-2a. Transformer
Attach one lead of the voltmeter to the
transformer terminal with a yellow wire attached to it,
which is point 11 on Figure 31. (This lead can be left
in place for most of the testing.) Touch the free lead of
the meter to the transformer terminal with a red wire,
point 1. The meter should show 20-28 volts. If there is
no voltage, replace the transformer.
4E-2b. Fuse
Leaving the "common" voltmeter lead in place at
point 11, touch the free probe to point 2. This is the
terminal block screw attached to the red wire from the
in-line fuse, and absence of voltage indicates a
defective fuse. If there is no voltage, inspect the rest of
the wiring to be sure that there is no "short" such as
contact of a terminal with the heater chassis or another
terminal. Correct any such condition and replace the
fuse.
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A
L1
BK
115V 60Hz
G
BK
N
B
W
W
Blower
G
BK
C
8