Friedrich WallMaster WCVT12B30A handleiding

Airco

Friedrich

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Handleiding

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DIAG

CODE

PROBLEM DESCRIPTION CORRECTIVE ACTION

Front Panel Button Stuck For

More Than 20 Seconds.

1. Ensure front cover does not depress buttons.

2. Check wiring connections from UI to Inverter board.

3. Replace UI and Cable.

4. Replace Inverter Board.

Inverter ﬁrmware check. Active when ﬁrmware version is less than the

desired version number.

Contact Customer Support.

Indoor Temperature Sensor is

Open or Shorted.

Unit will set temp to 75°F in COOLING or 68°F

in HEATING. Unit continues to operate.

Check for open or shorted temp sensor. Refer to Appendix for

temp. sensor values.

Indoor Coil Temperature Sensor

is Open or Shorted.

Control Board sets temp to a default of 40°F.

Override sensor. Unit continues to operate.

Check for open or shorted temp sensor. Refer to Appendix for

temp. sensor values.

Outdoor Coil Temperature

Sensor is Open or Shorted.

Unit sets temp to 20° F. and overrides sensor.

Operation continues. Unit uses electric heat if

available for heating. If not available uses heat

pump if outdoor temp allows.

Check for open or shorted temp sensor. Refer to Appendix for

temp. sensor values.

Outdoor Coil greater than 175° F. Unit turns compressor off. Waits for the

outdoor coil to be less than 150° F for more

than 2 consecutive minutes.

Indoor Coil less than 30° F for 2

consecutive minutes.

Unit turns compressor and electric heat off.

Operation resumes after lockout time or when

coil temp reaches 45°f.

Unit Cycles greater than 9 Times

per hour.

Unit continues operation.

Unit is oversized for the space.

Windows or doors to the outside are open.

3. Operating in Cooling mode while the outside

temperature is below 60 °F (16 °C).

1. Check the cooling capacity of your unit to ensure it is

properly sized for the room in which it is installed. Room air

conditioners are not designed to cool multiple rooms.

2. Ensure that all windows and doors are closed.

Unit Cycles less than 3 Times per

Hour.

Unit continues operation.

1. Unit is undersized for the space. (The air

conditioner has insufﬁcient cooling capacity to

match the heat gain or loss of the room.)

2. Unit is undersized for the space. (The air

conditioner has insufﬁcient heating capacity to

match the heat loss of the room.)

3. The return/ discharge air grille is blocked.

4. The ﬁlter is dirty or obstructed.

5. The indoor coil or outdoor coil is dirty or

obstructed.

6. There is excessive heat or moisture

(cooking, showers, etc.) in the room.

7. The temperature of the room you are trying

to cool is extremely hot or cold.

8. The digital control is set to fan cycling mode.

9. The temperature is not set at a cool

enough/ warm enough setting.

10. This may be due to an excessive heat load

in the room.

1. Check the cooling capacity of your unit to ensure it is

properly sized for the room in which it is installed. Room air

conditioners are not designed to cool multiple rooms.

2. Check the heating capacity of your unit. Air conditioners are

sized to meet the cooling load, and heater size is then selected

to meet the heating load. In extreme northern climates, room

air conditioners may not be able to be used as a primary

source of heat.

3. Ensure that the return and/ or discharge air paths are

not blocked by curtains, blinds, furniture, etc. Remove

obstructions.

4. Clean the ﬁlter, (see Routine Maintenance), or remove

obstruction.

5. Clean the coils, (see Routine Maintenance), or remove

obstruction.

6. Be sure to use exhaust vent fans while cooking or bathing

and, if possible, try not to use heat producing appliances

during the hottest part of the day.

7. Adjust the Temperature control to a cooler or warmer

setting as necessary. Allow additional time for the air

conditioner to cool off a very hot room.

8. Since the fan does not circulate the room air continuously

at this setting, the room air does not mix as well and hot (or

cold) spots may result. Using the continuous fan setting is

recommended to obtain optimum comfort levels.

9. Adjust the Temperature control to a cooler or warmer

setting as necessary.

10. If there are heat producing appliances in use in the room,

or if the room is heavily occupied, the unit will need to run

longer to remove the additional heat.

TROUBLESHOOTING

Diagnostic Codes

Figure 603

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