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240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
10-3. Fan motor
Part #
• 319143-443 (EK109) : Direct Vent Indoor model
• 319143-043 (EKK25) : Outdoor model
Unit Part#
#103
Function
To provide combustion air into the combustion chamber and to exhaust
flue gas.
Failure events
1. Fan speed failure, causing abnormal sounds with or without combustion
during operation.
2. Unexpected activation caused by the connectors of the fan motor getting wet.
3. Disconnects from the bottom of the combustion chamber.
Effects on the water heater
if fan motor fails
1. The water heater does not function properly.
2. Failure to ignite or abnormal ignition.
3. Unstable combustion conditions.
Error codes when
the fan motor fails
101 111 121 611 991
Diagnostic
1. Visual inspection: connection/breakage of wires or dust (causing electrical
shortage)
2. Voltage check: proper range of voltages shown below.
Color / Number of wires
Blue - Red
132 to 192 VDC (Input)
Check
point
G
Yellow - Blue
13 to 17 VDC (Input)
Orange - Blue
2.0 to 6.5 VDC (Input)
White - Blue
Verify the fan motor speed using the
Diagnostics Mode of the controller.
See Section 12-1 for details.
3-5/8" (92 mm)
6-1/2" (164 mm)
∅
Opening 2-1/8” ( 54 mm)
The fan motor for indoor model has the
red
connector and the fan motor for outdoor
model has the
white
connector.
PWN turbo fan motor
The connector