John Wood Takagi - 710 - Manual (Page 24)

24
Remote Controller: TM-RE30 (Optional)
PROBLEM POSSIBLE SOLUTIONS
Remote controller does not
display anything when the
power button is turned on. Press the ON/OFF button. If the lamp lights up:
• This is normal. When the unit has not operated for five minutes or more, the display
turns off to converse energy.
If the lamp does not light:
• Make sure the unit has power supply.
• Make sure the connection to the unit is correct.(pg. 12)
An ERROR code is dis-
played. • Please see the pg. 24.
Easy-link System
PROBLEM POSSIBLE SOLUTIONS
How are the unit numbers assigned?
7-Seg LED Button to check
unit numbers
• For an Easy-Link system, other than the PARENT Unit (which is always
labeled #1), all the other units (the CHILD units) are numbered ran-
domly.
• To check which numbers are assigned to which units, push the button
on the computer board of a unit as shown below. The unit number will
be displayed on the 7-Seg LED.
TROUBLESHOOTING – ERROR CODES
• The 710 units are self diagnostic for safety and convenience when trouble shooting.
• If there is a problem with the installation or the unit, it will display a numerical error code on the remote controller (if
installed) or on the 7-Seg LED of the central computer board and section computer board to communicate the source
of the problem.
• Consult the following chart for the cause of each error code.
Error
Code
Malfunction
description
Error
Code
Malfunction
description
Error
Code
Malfunction
description
031 DIPswitch Setting fault 391 Air-fuel Ratio Rod Failure 661
Water Control Valve Fault
(Bypass function)
101 Warning for 991 Error Code 441 Flow Sensor Failure 701 Computer board Fault
111 Ignition Failure 510 Abnormal Main Gas Valve 721 False Flame Detection
121 Flame blows out 551
Abnormal Gas Solenoid
Valve
741
Miscommunication between
water heater and remote
controller
311 Output Thermistor Failure 611 Fan Motor Fault 761
Miscommunication in Easy
link OR Multi-unit system
321 Inlet Thermistor Failure 631 Abnormal External Pump 991 Abnormal burning
331 Mixing Thermistor Failure 651
Water Control Valve Fault
(Flow Adjustment function)