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6.1 Error Codes (continued)
Error
Code Error Code Description
Possible Remedies
*Lockout
Type
76
Poor Communication
This Error Code will
clear
when the condition is remedied.
If
Error happens again:
1.
Check connections from main control to display panel.
2.
If the problem persists, replace the display.
Soft Lock
78
Cascade
Communication Error
NOTE: This error will only appear in a cascaded system.
1.
Turn power OFF and ON at the appliance display panel.
2.
If error reappears, ensure all cascaded appliances are powered ON.
3.
If error reappears, check Installer Mode parameter 13:cn at all cascaded appliances. Ensure the
address
number matches that of the connected appliance (01 for Master, 02 for Follower 1, etc.) and that no
numbers
are skipped or repeated.
4.
Ensure every water heater in the cascade system is connected properly. Inspect the cascade cables
and
ensure all are connected without damage or defect. Repair or replace any damaged cables.
Soft Lock
79
Combustion Issues
- Cascade / Common
Vent Application
NOTE: This error will only appear in a cascaded and common vent system as Er:79 on the Master and
Er:61 on a
f
ollower
water heater.
1.
Check the connections to the fan. Ensure all are secure.
2.
If the fan does not rotate during the ignition sequence, check for 8
-
26.5V
AC
power at the fan
connection.
If 8
-
26.5V
AC
power is present at the control, replace the fan. If the blower does not have 8
-
26.5V
AC
power, check power at the control. If 8
-
26.5V
AC
power is not present at the control, replace
the control.
Soft Lock
94
Exhaust NTC detects
Vent Temperature is
Greater than 149
°
F
(65
°
C)
This Error Code will go away when the condition is remedied.
If Error happens again:
1.
Check if dip switch MAX Fire setting is ON. Switches 6 and 7 should be OFF for normal operation.
2.
Check exhaust temperature sensor. Ensure connections are secure.
3.
Check sensor resistance. If resistance is zero, replace the sensor.
4.
Check exhaust vent for blockage.
Hard Lock
*Lockout Type :
Hard lock: requires manual reset / Soft Lock: resets itself when issue subsides.
Содержание LT Series
Страница 42: ...Page 42 4 20 Wiring Diagram...
Страница 43: ...Page 43 4 21 Ladder Diagram...
