Mitsubishi Electronics PURY-P400, P500YMF-C specifications 125, System error

Checking	Meaning, detecting method				Cause		Checking method & Countermeasure
code
6608	No response error		1) At the collision of mutual transmis-				a) Generation at test run.
				sion data when transmission wiring			Turn off the power sources of OC unit, IC unit
	Though acknowledgement of re-			is modified or the polarity is			and BC controller for more than 5 minutes si-
	ceipt (ACK) is received after			changed while turning the power			multaneously, and make them again.
	transmission, no response com-			source on, the wave shape changes			→ Returning to normal state means the trouble
	mand is returned.			detecting error.			detection due to transmission line work while
	Detected as error by transmission		2) Repeating of transmission error due				powering.
	side when the same symptom is			to noise.
	re-peated 10 times with an inter-		3)	Damping of transmission line volt-			b) Check 3) and 4) of the causes left.
	val of 3 seconds.			age/signal due to exceeding of the
				acceptable range for transmission			c) Investigate the transmission wave shape/noise
		Note:		wiring.			on transmission line according to <Investigation
		The address/attribute		•	Farthest	Less than 200m	method of transmission wave shape/noise>.
		shown on remote control-		•	RC wiring	Less than 10m
		ler indicates the control-	4)	Damping of transmission voltage/			Much possibility of a noise if 6602 is generated.
		ler which has detected		signal due to improper type of
		error.		transmission line.
				• Wire size : More than 1.25mm2

(3) System error

Checking

Meaning, detecting method

Cause

Checking method & Countermeasure

code

7100

Total capacity error

1) Total capacity of indoor units in the

a)

Check for the model total (capacity cord total) of

same refrigerant system exceeds

indoor units connected.

Total capacity of indoor units in

the following:

b)

Check whether indoor unit capacity code (SW2)

the same refrigerant system ex-

is wrongly set.

ceeds limitations.

Model

Total capacity

Total capacity code

For erroneous switch setting, modify it, turn off

PURY-P400

599

123

Trouble source:

PURY-P500

756

156

power source of outdoor unit, and indoor unit

Outdoor unit

simultaneously for 5 minutes or more to modify

the switch for setting the model name (capacity

coad).

2) Erroneous setting of OC model se-

Check for the model selector switch (Dip switches

lector switch (SW3-10).

SW3-10 on outdoor unit control circuit) of OC.

ON ..... 500

OFF ...400

1

2

3

4

5

6

7

8

9

10

SW3

7101

Capacity code error

1) The Indoor unit model name (model

a)

Check for the model name of the Indoor unit

code) connected is not connectable.

connected.

Error display at erroneous con-

Connectable range.....20~250

nection of Indoor unit of which

b)

Check for the switch (SW2 if indoor controller

model name can not be con-

2) Erroneous setting of the switch

for setting of Indoor unit model name of gener-

nected.

(SW2) for setting of model name of

ating address. When it is not agreed to the model

Indoor unit connected.

name, modify the capacity code while shutting

Trouble source :

off the power source of Indoor unit.

Outdoor unit

*

The capacity of Indoor unit can be confirmed by

Indoor unit

the self-diagnosios function (SW1 operation) of

Indoor unit.

7102

Connected unit count over

1) Number of unit connected to termi-

a)

Check whether the connection of units to the

nal block (TB3) for outdoor/indoor

terminal block for indoor/outdoor transmission

Number of units connected in the

transmission line exceeds limita-

wiring (TB3) of outdoor unit is not exceeding the

same refrigerant system exceeds

tions given belows:

limitation.

limitations.

(See 1 ~ 3 left.)

Item

Limitation

b)

Check for 2), 3), 4) and 5).

Trouble source:

1Total of

1~24

c)

Check for the connection of transmission wiring

Outdoor unit

Indoor unit

to the terminal block for centralized control is

2Total of BC

1

erroneously connected to the indoor/outdoor

controller (master)

transmission wiring terminal block (TB3).

3Total of BC

0 or 1

controller (slave)

–125–