T-K3 Service Manual
Ver. 1.05
20
CONFIDENTIAL
10-8. Flow adjustment valve
T-K3 Part #
#402
Takagi Part #
EKK0T
Checkpoint
J1
Function
Failure event
Effects on the T-K3
if flow adjustment
valve
fails
Error codes when
Flow Adjustment
Valve fails.
Diagnostic
Color/Number of
wires
Black-Red
The flow adjustment valve is assembled with the flow sensor.
1. Visual inspection: connection/breakage of wires, motor drive locked due to
scale buildup, and/or water leakage.
2. Check voltages and resistance; proper range of values shown below.
DC7~16V and 0.09~0.2k
Ω
Controls water flow to properly control the output hot water temperaturet.
1. Water leakage from valve.
2. The valve cannot modulate or make open/close positions.
1. Water leakage from failed valve can damage other T-K3 components.
2. Temperature fluctuations in the hot water output.
3. Within a multi-unit Easy-Link system, the "651" error code can occur.
651 (only within multi-unit Easy-Link systems)
Flow adjustment
valve
+
-
-
+
1
3
2
O p e n
( R e d )
３
C l o s e
( B l a c k )
１
M
N o . ３
N o . 2
N o . １
Flow
adjustment
valve
>
PPE
-GF
<
1- 7/ 8 " (4 7m m)
3-
3/
8"
(
84
.4
m
m
)
2- 5/ 8" (6 7.5 mm )
I N
O U T
Flow
adjustment
valve
Flow sensor
Flow
adjustment
valve
Flow sensor
O U T
I N