Trouble Diagnosis; Contents Of Remote Controller Switch Alarm Display - Panasonic U-36LE1U6 Service Manual

Mini vrf system (r410a)

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Table of Contents

1. Contents of Remote Controller Switch Alarm Display

Remote controller is

Serial

detecting error signal from

communication

indoor unit.

errors

Mis-setting

Indoor unit is detecting error signal from remote controller (and system controller).

Indoor unit is detecting error

signal from outdoor unit.

Outdoor unit is detecting error

signal from indoor unit.

Improper setting

Indoor unit communication

error of group control wiring.

During auto address setting,

number of connected units

does not correspond to

number set.

Improper setting

Indoor unit

Thermistor

fault

Possible cause of malfunction

Error in receiving serial communication signal.

(Signal from main indoor unit in case of group control)

(Auto address is not completed.)

Error in transmitting serial communication signal.

Error in receiving serial communication signal.

When turning on the power supply, the number of connected

indoor units does not correspond to the number set.

(Except R.C. address is "0.")

Error in receiving serial communication signal.

There is an indoor unit which does not send signals when

the power is ON.

Indoor unit address setting is duplicated.

Duplicated remote controller "main" setting.

Automatic address setting start is prohibited.

AP pin was short-circuited at time when automatic

address setting was started.

Error of main indoor unit in receiving serial communication

signal from sub indoor units.

Number of connected indoor units is less than the number

set.

Number of connected indoor units is more than the number

set.

No indoor unit is connected during auto address setting.

Duplicated outdoor unit address.

Mismatch in "No. of outdoor units" setting.

Connected indoor unit is not a multi unit.

Duplication of main indoor unit address setting in group

control.

Duplicated indoor unit priority (priority indoor unit).

Duplicated indoor unit priority (non-priority indoor unit) and

outdoor unit.

Group control wiring is connected to individual control

indoor unit.

Indoor unit address is not set.

Capacity code of indoor unit is not set.

Mismatch of outdoor unit type.

Duplication of outdoor R.C. address setting.

Capacity code of outdoor unit is not set.

Indoor coil temp. sensor (E1)

Indoor coil temp. sensor (E3)

Indoor suction air (room) temp. sensor (TA)

Indoor discharge air temp. sensor (BL)

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