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© 2008 D540e - 02/08
Error Messages (1 of 1)
Error Message
Description
CONTROL ERROR
The thermostat was unable to correctly read settings from memory and has reloaded
the factory defaults settings. The thermostat does not operate the heating, cooling, or
the fan while this error message is present.
Error clears once all adjust menu settings have been checked.
To enter the installer adjust menu, press
Mode
,
, and
buttons at the same time.
Press the Mode button to advance to the next setting.
BUS ERROR
The tN4 communication bus has either an open or a short circuit. The result is that there
are no communications. Check for loose wires. Check for short circuits between the tN4
and C wires. Check for correct polarity between the C and R wires.
Error clears automatically once wiring fault has been corrected.
If the thermostat is intentionally removed from the tN4 bus, press the and
buttons
together to clear the error message.
DEVICE LIMIT
The number of devices on the tN4 bus has exceeded 24. Devices include tN4 Thermostats,
and tN4 Setpoint Controls. The device count must be lowered to 24 or less. If possible,
move devices to other tN4 busses.
Error clears automatically once the number of devices on the tN4 bus is at 24 or
lower.
ADDRESS ERROR
This thermostat and another device have been manually given the same tN4 address.
Error clears automatically once this thermostat is given a new manually set address or
if the thermostat is set to automatic addressing.
ROOM SENSOR SHORT CIRCUIT
The built-in air temperature sensor has a short circuit fault.
This error cannot be field repaired.
Contact your wholesaler or kanmor sales representative for details on the repair
procedures.
ROOM SENSOR OPEN CIRCUIT
The built-in air temperature sensor has an open circuit fault.
This error cannot be field repaired.
Contact your wholesaler or kanmor sales representative for details on the repair
procedures.
COOL MASTER ERROR
Switch setting number 3 has been selected to become a cool group master of group
number 1, and another cool group master has been detected with the same group
number.
The cooling system will not operate while this error message is present.
Error clears once either the other cool group master changes its group number or switch
setting number 3 is set to none (On position).
Error Messages
