Checking code

1111

Low

 

pressure

 

saturation

 

tempera-

 

ture

 

sensor

 

abnormal-

 

ity (TH2)

1112

 

Liquid

 

 

level

 

 

detecting

 

 

tempera-

 

 

ture

 

 

sensor

 

 

abnormal-

 

saturationtemperaturetrouble

ity (TH4)

 

 

 

pressure

 

1113

Liquid

 

 

 

level

 

Low

detecting

 

tempera-

 

 

 

 

ture

 

 

sensor

 

 

abnormal-

 

 

ity (TH3)

 

Meaning, detecting method

 

 

Cause

Checking method & Countermeasure

1.

When saturation temperature

1)

Gas leak, Gas shortage.

See Refrigerant amount check.

 

sensor (TH2) or liquid level de-

 

 

 

 

 

 

 

 

 

 

tecting temperature sensors

2)

Insufficient load operations.

Check operating conditions and opera-

 

(TH3, TH4) detects -40˚C or

 

 

 

 

 

 

 

tion status of outdoor unit.

 

less (the first time) during op-

 

 

 

 

 

 

 

 

 

 

erations, outdoor unit stops

3) Poor operations of indoor LEV.

Check operation status by actually per-

 

once, mode is changed to re-

4) Poor operations of BC controller

forming cooling-only or heating-only

 

start mode after 3 minutes, then

 

 

LEV:

 

 

 

 

operations.

 

 

the outdoor unit restarts.

 

 

Cooling-only : LEV3

 

 

 

 

 

 

Cooling-main

: LEV1, 3

Cooling-only

: indoor LEV

2.

When -40˚C or less temp. is

 

 

Heating-only, Heating-main:

 

LEV1, 3 (BC)

 

detected again (the second

 

 

 

LEV3

 

SVM (BC)

 

time) within 30 minutes after

 

 

Defrost

: LEV3

 

SVA (BC)

 

stop of outdoor unit, error stop

5) Poor operations of BC controller

Heating-only

: indoor LEV

 

is observed with code Nos.

 

 

SVM1:

 

 

 

 

 

LEV3

 

“1111,” “1112,” or “1113” dis-

 

 

Cooling-only, Defrost

 

(BC)

 

played.

6) Poor operations of BC controller

 

SVB (BC)

 

 

 

 

SVM1:

 

 

 

 

 

SV3~8

3.

When -40˚C or less tempera-

 

 

Cooling-only, Cooling-main

 

 

 

ture is detected 30 or more min-

7) Poor operations of BC controller

 

 

 

utes after stop of outdoor unit,

 

 

SVB:

 

 

 

 

 

 

 

the stop is regarded as the first

 

 

Heating-only, Heating-main

See Trouble check of LEV and sole-

 

time and the process shown in

8) Solenoid valve trouble (SV3 ~ 8)

 

1. is observed.

 

 

Heating-only, Heating-main

noid valve.

 

4. 30 minutes after stop of outdoor

9)

Setting error of connection address.

Check address setting of indoor unit

 

unit is intermittent fault check

 

 

 

 

 

 

 

connector.

 

 

period with LED displayed.

 

 

 

 

 

 

 

 

 

Note:

10)Poor operations of ball valve.

Confirm that ball valve is fully opened.

 

 

 

 

 

 

 

 

 

 

1. Low press. saturation tem-

11) Short cycle of indoor unit.

Check indoor unit, and take measu-res

 

perature trouble is not de-

12)Clogging of indoor unit filter.

to troube.

 

 

tected for 3 minutes after

13)Fall in air volume caused by dust

 

 

 

compressor start, and finish

 

 

on indoor unit fan.

 

 

 

of defrosting operations, and

14)Dust on indoor unit heat exchanger.

 

 

 

during defrosting operations.

15)Indoor unit block, Motor trouble.

 

 

 

2. In the case of short/open of

 

 

 

 

 

 

 

 

 

 

9)~14) : Fall in low pressure

 

 

 

 

 

 

 

 

 

 

 

 

 

TH2~TH4 sensors before

 

 

caused by evaporating capac-

 

 

 

 

 

 

starting of compressor or

 

 

ity in cooling-only cooling-prin-

 

 

 

 

 

 

within 10 minutes after start-

 

 

cipal operation.

 

 

 

 

 

 

ing of compressor, “1111,”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“1112,” or “1113” is displayed

16)Short cycle of outdoor unit.

Check outdoor unit, and take measures

 

too.

17)Dust on outdoor heat exchanger.

to trouble.

 

 

 

18)Indoor unit fan block, motor trouble,

Check outdoor unit fan.

 

 

 

 

and poor operations of fan control-

See Trouble check of outdoor unit

 

 

 

 

ler.

 

 

 

 

fan.

 

 

 

 

 

15)~17) : Fall in low press.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

caus-ed by lowered evaporat-

 

 

 

 

 

 

 

 

 

ing capa-city in heating-only

 

 

 

 

 

 

 

 

 

heating-principal operation.

 

 

 

 

 

 

 

 

 

 

See Trouble check of solenoid valve.

 

 

19)Poor operations of solenoid valve

 

 

 

 

SV4a.

 

 

 

 

 

 

 

 

 

 

Bypass valve (SV4a) can not

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

control low pressure drop.

 

 

 

 

 

 

 

 

 

 

Check resistance of thermistor.

 

 

20)Thermistor trouble (TH2~TH10).

 

 

21)Pressure sensor abnormality.

See Trouble check of pressure sen-

 

 

 

 

 

 

 

 

 

sor.

 

 

 

22)Control circuit board thermistor

Check inlet temp. and press. of sensor

 

 

 

 

abnormality and pressure sensor

by LED monitor.

 

 

 

 

 

input circuit abnormality.

 

 

 

 

23)Poor mounting of thermistor

 

 

 

 

 

 

(TH2~TH10).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

–106–

Page 108
Image 108
Mitsubishi Electronics P500YMF-C, PURY-P400 specifications 106, LEV3 SVM BC, SVM1 LEV3

PURY-P400, P500YMF-C specifications

Mitsubishi Electronics has long been a leader in the HVAC industry, known for its innovative technology and reliable performance. Among its notable offerings are the P500YMF-C and PURY-P400 models, designed to address the diverse needs of commercial and residential applications.

The Mitsubishi P500YMF-C is a high-performance outdoor unit that showcases energy efficiency and advanced refrigerant technology. It employs a sophisticated inverter-driven compressor, which optimizes energy usage by adjusting its speed based on the specific heating and cooling demands of the environment. This flexibility helps to minimize energy consumption while ensuring optimal comfort.

One of the standout features of the P500YMF-C is its ability to provide consistent heating and cooling even in extreme outdoor temperatures. The unit can operate effectively in low-temperature conditions, making it ideal for regions with harsh winters. Furthermore, the system is designed with a robust build, ensuring durability and longevity.

On the other hand, the PURY-P400 is an indoor multi-split system that complements the outdoor unit perfectly. It's designed for versatility and efficiency, capable of accommodating multiple indoor units connected to a single outdoor unit. This feature is particularly beneficial for larger spaces or buildings where different zones require individual climate control.

The PURY-P400 incorporates Mitsubishi's advanced filtration technology, which significantly improves indoor air quality. It features a multi-layer filtration system that effectively removes dust, allergens, and other particulates from the air, ensuring a healthier environment for occupants.

Both systems utilize R-32 refrigerant, which has a lower global warming potential compared to traditional refrigerants. This not only makes them more eco-friendly but also complies with emerging environmental regulations. The ease of installation and operation of these units is another noteworthy characteristic, with intuitive controls and user-friendly interfaces that facilitate seamless integration into existing systems.

In summary, the Mitsubishi P500YMF-C and PURY-P400 represent a fusion of technology, efficiency, and user-centric design. With a range of features aimed at enhancing performance and environmental sustainability, these models are an excellent choice for anyone looking to invest in a reliable and efficient HVAC system. Whether for residential or commercial use, Mitsubishi’s offerings continue to set the standard in comfort and efficiency.