Checking code

Meaning, detecting method

 

 

Cause

Checking method & Countermeasure

1301

Low pressure

When starting from the stop mode

1)

Internal pressure is dropping due

Refer to the item on judging low pres-

 

abnoramlity

for the first time, (if at the start of bind

 

 

to a gas leak.

 

 

 

sure pressure sensor failure.

 

 

power transmission, the end of bind

2)

The low pressure pressure sensor

 

 

 

 

 

power transmission, and in the mode

 

 

is defective.

 

 

 

 

 

 

 

 

when the thermostat goes OFF im-

3)

Insulation is torn.

 

 

 

 

 

 

 

 

mediately after the remote control

4)

A pin is missing in the connector,

 

 

 

 

 

goes ON, the following compressor

 

 

or there is faulty contact.

 

 

 

 

 

start time is included), if the low pres-

5)

A wire is disconnected.

 

 

 

 

 

sure pressure sensor before start-

6)

The control board’s low pressure

 

 

 

 

 

ing is at 1.0 kg/cm2G (0.098MPa),

 

 

pressure sensor input circuit is de-

 

 

 

 

 

operation stops immediately.

 

 

 

fective.

 

 

 

 

 

 

 

 

 

 

 

 

1302

High pressure

1. When press. sensor detects

1)

Poor operations of indoor LEV.

Check operations status by actually

 

abnoramlity 1

28kg/cm2G (2.47MPa) or more

2)

Poor operations of BC controller

performing cooling or heating opera-

 

(Outdoor unit)

during operations (the

first

 

 

LEV:

 

 

 

tions.

 

 

 

 

time), outdoor unit stops once,

 

 

Heating-only, heating-principal:

Cooling

:

Indoor LEV

 

 

mode is changed to restart

 

 

 

LEV3

 

 

LEV1, 3 (BC)

 

 

mode after 3 minutes, then the

 

 

Defrost:

LEV3

 

 

SVM SVA (BC)

 

 

outdoor unit restarts.

 

3)

Poor operations of BC controller

 

 

SV3~8

 

 

 

 

 

 

SVM1:

 

 

 

Heating

:

Indoor LEV

 

 

2. When 30kg/cm2G (2.94MPa) or

 

 

Cooling-only, defrost

 

 

LEV3 (BC)

 

 

more pressure is detected

4)

Poor operations of BC controller

 

 

SVB (BC)

 

 

again (the second time) within

 

 

SVA:

 

 

 

 

 

 

 

 

30 minutes after stop of outdoor

 

 

Cooling-only, cooling-main

 

 

 

 

 

unit,error stop is observed with

5)

Poor operations of BC controller

 

 

 

 

 

code No. “1302” displayed.

 

 

SVB:

 

 

 

 

 

 

 

 

 

 

 

 

Heating-only, heating-main

See Trouble check of LEV and sole-

 

 

3. When 28kg/cm2G (2.47MPa) or

6)

Solenoid valve SV (3 ~ 8) trouble

 

 

more pressure is detected 30

 

 

Cooling-only, cooling-main

noid valve.

 

 

 

 

or more minutes after stop of

 

 

 

 

 

 

 

 

 

 

 

outdoor unit, the detection is re-

7)

Setting error of connection address. Check address setting of indoor unit

 

 

garded as the first time and the

 

 

 

 

 

 

connector.

 

 

 

 

process shown in 1 is observed.

 

 

 

 

 

 

 

 

 

 

 

4. 30 minutes after stop of outdoor

8)

Poor operations of ball valve.

Confirm that ball valve is fully open-ed.

 

 

 

 

 

 

 

 

 

 

 

 

 

unit is intermittent fault check

9)

Short cycle of indoor unit.

Check indoor unit and take measures

 

 

period with LED displayed.

10)Clogging of indoor unit filter.

to trouble.

 

 

 

 

5. Error stop is observed immediately

11) Fall in air volume caused by dust

 

 

 

 

 

 

 

on indoor unit fan.

 

 

 

 

 

when press. switch (30-+01.5

kg/

12)Dust on indoor unit heat exchanger.

 

 

 

 

 

cm2G (2.94-+01.5MPa)) operates in

13)Indoor unit fan block, motor trouble.

 

 

 

 

 

addition to pressure sensor.

 

 

 

8)~13) : Rise in high pressure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

caused by lowered condensing

 

 

 

 

 

 

 

 

 

 

 

capacity in heating-only and

 

 

 

 

 

 

 

 

 

 

 

heating-principal operation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14)Short cycle of outdoor unit.

Check outdoor unit and take measures

 

 

 

 

15)Dust on outdoor unit heat exchanger. to trouble.

 

 

 

 

 

 

16)Outdoor unit fan block, motor trou-ble,

Check outdoor unit fan

 

 

 

 

 

 

poor operations of fan controller.

See Trouble check of outdoor unit

 

 

 

 

 

 

14)~16):Rise in high press.

 

 

fan.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

caused by lowered condensing

 

 

 

 

 

 

 

 

 

 

 

capacity in cooling-only and

 

 

 

 

 

 

 

 

 

 

 

cooling-pincipal operation.

 

 

See Trouble check of solenoid valve.

 

 

 

 

 

 

 

 

 

 

 

 

17)Poor operations of solenoid valves

 

 

 

 

 

 

SV1, 4a (Bypass valves (SV1, 4a)

 

 

 

 

 

 

 

 

 

can not control rise in high pressure).

 

 

 

18)Thermistor trouble (TH2, TH5, TH6). Check resistance of thermistor.

19)Pressure sensor trouble.

Check Trouble check of pressure

 

sensor.

20)Control circuit board thermistor

Check inlet temperature and press. of

trouble, press. sensor input circuit

sensor with LED monitor.

trouble.

 

–107–

Page 109
Image 109
Mitsubishi Electronics PURY-P400, P500YMF-C specifications 107, LEV3 SVM SVA BC

PURY-P400, P500YMF-C specifications

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