T-H2-DV/T-H2-OS Service Manual
Ver. 1.01
83
CONFIDENTIAL
12-18. Manually adjusting the fan motor speed
While the FM+ and the FM++ dipswitch will automatically increase the fan speed, the fan
motor speed on the T-H2-DV or T-H2-OS can also be manually adjusted. (Refer to Section 12-5)
In order to perform manual adjustments to the speed, a TM-RE30 remote controller is
required.
Manually adjusting the fan motor speed of the T-H2-DV or T-H2-OS will change the amount
of intake air for combustion, which can cause excess CO emission from the exhaust chamber
if the fan motor speed is set incorrectly. Therefore, this procedure should never be
performed unless the Technical Services Department has given consent and authorization.
Adjusting maximum fan motor speed
1. While T-H2-DV or T-H2-OS is in operation, set dipswitch No.4 on T-H2-DV/T-H2-OS computer board to
the “ON” position. (Figure 1)
2. On the temperature remote controller, display mode #3 (fan motor speed) by entering the
“Diagnostics mode” (Refer to Section 12-1).
3. Press and hold down the “MAX” button on the computer board. While holding down the “MAX”
button, press either the “Increase” or “Decrease”” button to increase or decrease the fan motor
speed, respectively (Figure 2). Refer to the remote controller display to verify that speed has been
set to desired value.
4. After fan speed has been set, set dipswitch No.4 back to the “OFF” position.
Adjusting minimum fan motor speed
1. While T-H2-DV or T-H2-OS is in operation, set dipswitch No.4 on T-H2-DV/T-H2-OS to the “ON” position.
(Figure 1)
2. On the temperature remote controller, display mode #3 (fan motor speed) by entering the
“Diagnostics mode” (Refer to Section 12-1).
3. Press and hold down the “MIN” button on the computer board. While holding down the “MIN”
button, press either the “Increase” or “Decrease” button to increase or decrease the fan motor speed,
respectively (Figure 2). Refer to the remote controller display to verify that speed has been set to
desired value.
4. After fan speed has been set, set dipswitch No.4 back to the “OFF” position.
WARNING
