SVC 810 Tankless Troubleshooting Manual
33
Error Code 66 (RTG66 Only)
Explanation: Water By-Pass Control fault. At a minimum check the following:
1.
Verify there is water flow thru the unit even if the unit does not fire.
2.
Access maintenance information to determine flow rate.
3.
Check all wiring connections to the water control and connector B on the Printed Circuit
Board.
Measure the voltage at connector B between the
Red#7 and Black#8 wires for: 8 to 16 VDC
Measure the voltage at connector B between the Red#7 and Black#8
wires for: 8 to 16 VDC
Is the voltage to
the water by-
pass control
OK?
Yes
No
Replace the Printed Circuit Board
Turn power off;
unplug unit and
then on again.
When motor
operates, is the
voltage to the
water control
OK?
No
Replace the Printed Circuit Board
Replace the Water Control Assembly
Содержание SVC 810
Страница 21: ...SVC 810 Tankless Troubleshooting Manual 20 Fan Speed Chart ...
Страница 22: ...SVC 810 Tankless Troubleshooting Manual 21 RTG2 42 Wiring Diagram ...
Страница 23: ...SVC 810 Tankless Troubleshooting Manual 22 Printed Circuit Board ...
Страница 24: ...SVC 810 Tankless Troubleshooting Manual 23 RTG 53 Wiring Diagram RTG 53 ...
Страница 25: ...SVC 810 Tankless Troubleshooting Manual 24 Printed Circuit Board RTG 53 ...
Страница 26: ...SVC 810 Tankless Troubleshooting Manual 25 RTG 66 Wiring Diagram ...
Страница 36: ...SVC 810 Tankless Troubleshooting Manual 35 Printed Circuit Board RTG 74 ...