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SECTION VII: TROUBLESHOOTING (cont.)
Table 13 shows a list of blocking error codes. A blocking code will be visible on the control
display in the form of a code (letter "E" followed by a number) and a short message. Blocking
errors automatically reset once the error is corrected.
Table 13: Blocking Error Codes
Code
Error Message
E34 ! E38
WD INTERNAL ERROR
E31 ! E34
REF HI/LO TOO HI/LO
E35
FALSE FLAME
E36
BLOCKED VENT
E38
LOW GAS PRESSURE
E39
FLUE GAS LIMIT
E43, E47
various WD ERRORS
E44
PHASE ERROR
EARTH GROUND
E46
ERROR
WATER T SENSOR
E51 or E52
OPEN
WATER T SENSOR
E59 or E60
SHORT
E65
FLUE SENSOR SHORT
E66
RESET BUTTON ERROR
E72
APPLIANCE SEL ERROR
E76, E77, E79,
various fan errors
OR E81
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BLOCKING ERRORS
Description:
Internal software error.
Causes & Actions:
Contact a qualified agency to inspect the control.
Description:
Internal hardware error.
Causes & Actions:
Contact a qualified agency to inspect the control.
Description:
A flame is detected when no flame is allowed.
The control and/or gas valve is not working properly ! contact a qualified
Causes & Actions:
agency.
Description:
The blocked vent circuit is open.
Intake or exhaust vent is blocked ! inspect and clean.
Causes & Actions:
Faulty or loose wiring to switches ! check blue and yellow wires.
Excessive wind or room draft is creating high pressures.
Description:
The gas supply pressure is too low.
Low supply pressure or undersized piping ! see manual.
Gas supply is turned off.
Causes & Actions:
Pressure drop due to other appliances on the same supply line.
Faulty or loose wiring to switch ! check black/yellow wires.
Description:
The flue gas temperature has exceded the high limit.
Causes & Actions:
Exhaust pipe is blocked ! inspect and clean.
Description:
Various WD communication errors.
Causes & Actions:
Contact a qualified agency to inspect the control.
Description:
The polarity at the main power supply is reversed.
The hot and neutral wires are reversed ! Contact a qualified agency to inspect
Causes & Actions:
the installation.
Description:
A faulty earth ground connection is detected.
Causes & Actions:
Improper wiring ! check all green wires.
Description:
The water temperature sensor is open.
Causes & Actions:
Faulty or loose wiring ! check sensor, wires and connections.
Description:
The water temperature sensor is shorted.
Causes & Actions:
Short in circuit ! check sensor, wires and connections.
Description:
The flue sensor is shorted.
Causes & Actions:
Short in circuit ! check sensor, wires and connections.
Description:
An error has occurred with the reset button ("i" button)
Causes & Actions:
Contact a qualified agency to inspect the control display.
Description:
An error has occurred due to incorrect applicance selection.
Causes & Actions:
Contact a qualified agency to inspect the controls.
A communication error has occurred with the fan.
Description:
Contact a qualified agency to inspect the control
Causes & Actions:
Description & Possible Causes
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