John Wood Takagi - 710 User 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)