Error Code

Abnormal point and detection method

Case

 

 

 

 

 

 

 

Judgment and action

 

 

 

 

 

Pipe temperature

1 Slight temperature difference

1~4 Check pipe <liquid or condenser /

 

 

 

<Cooling mode>

between indoor room

 

 

 

 

 

evaporator> temperature with room

 

 

 

Detected as abnormal when the pipe tem-

temperature and pipe <liquid

 

 

 

 

 

temperature display on remote

 

 

 

 

 

perature is not in the cooling range 3 min-

or condenser / evaporator>

 

 

 

 

 

controller and outdoor controller circuit

 

utes after compressor start and 6 minutes

temperature thermistor

 

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

 

 

after the liquid or condenser/evaporator pipe

• Shortage of refrigerant

 

 

 

 

 

Pipe <liquid or condenser / evaporator>

 

is out of cooling range.

• Disconnected holder of pipe

 

 

 

 

 

temperature display is indicated by

 

 

 

Note 1) It takes at least 9 min. to detect.

<liquid or condenser /

 

 

 

 

 

setting SW2 of outdoor controller circuit

 

Note 2) Abnormality P8 is not detected in

evaporator> thermistor

 

 

 

 

 

board as follows.

 

 

 

 

 

 

 

 

)

 

 

drying mode.

• Defective refrigerant circuit

 

 

Conduct temperature check with outdoor

 

 

Cooling range : Indoor pipe temperature

2 Converse connection of

 

 

 

 

 

 

controller circuit board after connecting

 

 

 

 

 

 

 

 

(TH2 or TH5) – intake temperature

extension pipe (on plural units

(‘A-Control Service Tool(PAC-SK52ST)’.

 

 

(TH1) [ -3 deg [-5.4˚F]

connection)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TH: Lower temperature between liquid pipe

3 Converse wiring of indoor/

 

Temperature display of indoor liquid pipe

Temperature display of indoor condenser/

 

 

 

 

 

temperature and condenser/

outdoor unit connecting wire

 

Indoor 1

 

 

 

 

 

 

evaporator pipe

Indoor 1

 

 

 

 

 

 

1

2

3

4

5

6

 

1

2

3

4

 

5

6

 

 

P8

evaporator temperature

(on plural units connection)

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

ON

 

 

4 Defective detection of indoor

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

OFF

 

 

<Heating mode>

room temperature and pipe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Temperature display of indoor liquid pipe

Temperature display of indoor condenser/

 

When 10 seconds have passed after the

<condenser / evaporator>

 

 

 

Indoor 2

 

 

 

 

 

 

evaporator pipe

Indoor 2

 

 

 

 

 

compressor starts operation and the hot

temperature thermistor

 

1

2

3

4

5

6

 

1

2

3

4

 

5

6

 

 

 

adjustment mode has finished, the unit is

5 Stop valve is not opened

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

detected as abnormal when

completely.

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

condenser/evaporator pipe temperature is

 

 

 

 

 

 

 

 

 

A-Control Service Tool SW2 setting

 

 

 

 

 

not in heating range within 20 minutes.

 

23Check converse connection of extension

 

 

 

 

Note 3) It takes at least 27 minutes to

 

 

 

 

pipe or converse wiring of indoor/outdoor

 

detect abnormality.

 

 

 

 

unit connecting wire.

 

 

 

 

 

 

 

 

 

 

 

Note 4) It excludes the period of defrosting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Detection restarts when defrosting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mode is over)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating range : 3 deg [5.4˚F] [ (Condenser/

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Evaporator temperature(TH5) –

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

intake temperature(TH1))

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

<M-NET communication error>

(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Error Code

Abnormal point and detection method

Case

 

 

 

 

 

 

 

Judgment and action

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Address duplicate definition

1 There are 2 or more same

Search the unit with same address as abnormality

 

This error is displayed when transmission

address of controller of out-

occurred. If the same address is found, turn off the

A0

from the units of same address is detect-

door unit, indoor unit, FRESH

power supply of outdoor unit and indoor unit and

ed.

MASTER, or LOSSNAY.

FRESH MASTER or LOSSNAY at the same time

(6600)

Note) The address and attribute displayed

2 Noise has entered into trans-

for 2 minutes or more after the address is correct-

 

at remote controller indicate the con-

mission signal and signal was

ed, and turn the power on again.

 

 

 

 

 

 

 

 

Check transmission waveform or noise on trans-

 

troller that detected abnormality.

transformed.

 

mission wire.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hardware error of transmission

1 Error is detected if waveform is

1 If the works of transmission wire is done with

 

processor

transformed when wiring works of

 

 

the power on, turn off the power supply of

 

Transmission processor intended to trans-

transmission wire of outdoor unit,

 

 

outdoor unit and indoor unit and FRESH

 

 

 

mit “0”, but “1” appeared on transmission

indoor unit, FRESH MASTER or

 

 

MASTER or LOSSNAY at the same time for

A2

wire.

LOSSNAY are done, or polarity is

 

 

2 minutes or more, and turn the power on

Note) The address and attribute display at

changed with the power on and

 

 

again.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6602)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

remote controller indicate the con-

transmission data collide each other.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 Defective transmitting receiving

2 Check transmission waveform or noise on

 

troller that detected abnormality.

 

circuit of transmission processor

 

 

transmission wire.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 Transmission data is changed by

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the noise on transmission.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BUS BUSY

1 Transmission processor could

1 Check if transmission wire of indoor unit,

 

1. Overtime error by collision damage

not transmit signal because short

 

 

FRESH MASTER, LOSSNAY, or remote con-

 

Abnormal if transmitting signal is not

cycle voltage of noise and the

 

 

troller is not connected to terminal block for

 

possible for 8-10 minutes continuously

like have entered into transmis-

 

 

central control (TB7) of outdoor unit.

 

 

 

 

because of collision of transmission.

sion wire continuously.

2 Check if transmission wire of indoor unit,

 

2. Data could not reach transmission wire

2 Transmission quantity has

 

 

FRESH MASTER or LOSSNAY is not con-

 

for 8-10 minutes continuously because

increased and transmission is

 

 

nected to terminal block for transmission

 

of noise or etc.

not possible because there was

 

 

wire of outdoor unit.

 

 

 

 

 

 

 

 

 

 

 

wiring mistake of terminal block

 

 

 

 

 

 

 

 

 

 

 

 

 

Note) The address and attribute displayed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

for transmission wire (TB3) and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

at remote controller indicate the con-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(6603)

terminal block for central control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

troller that detected abnormality.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(TB7) in outdoor unit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 Transmission are mixed with

3 Check if terminal block for transmission wire

 

 

others and occupation rate on

 

 

(TB3) and terminal block for central control

 

 

transmission wire rose because

 

 

(TB7) are not connected.

 

 

 

 

 

 

 

 

 

 

of defective repeater (a function

4 Check transmission waveform or noise on

 

 

to connector or disconnect trans-

 

 

transmission wire.

 

 

 

 

 

 

 

 

 

 

 

 

mission of control and central

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

control system) of outdoor unit,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

then abnormality is detected.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

42

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Mitsubishi Electronics PUZ-A36NHA2-BS NET communication error, Case Judgment and action Pipe temperature, Processor
Page 41 Page 43

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