Checking code

Meaning, detecting method

 

Cause

Checking method & Countermeasure

 

 

 

 

 

4240

Over loard

If IAC 32 Arms is detected con-

1)

Air passage short cycle.

Is the unit’s exhaust short cycling?

 

protection

tinuously for 10 minutes during op-

 

 

 

 

 

 

eration of the inverter after 5 or

2)

The heat exchanger is clogged.

Clean the heat exchanger.

 

 

more seconds have passed since

 

 

 

 

 

 

the inverter started.

3)

Power supply voltage.

If the power supply voltage is less than

 

 

 

 

 

 

342 V, it is outside specifications.

 

 

 

 

4)

External air temperature.

If the external air temperature is over

 

 

 

 

 

 

43° C it is outside the specifications.

 

 

 

 

5)

Capacity setting error.

• Is the indoor unit capacity total cor-

 

 

 

 

 

 

 

rect?

 

 

 

 

 

 

•

Are the outdoor/indoor unit capac-

 

 

 

 

 

 

 

ity settings correct?

 

 

 

 

6)

The solenoid valves (SV1, 2) are

To judge failure of the solenoid valve,

 

 

 

 

 

defective, or the solenoid valve

go to “Individual Parts Failure Judg-

 

 

 

 

 

drive circuit is defective.

ment Methods” for the “Solenoid Valve.”

 

 

 

 

7)

The wiring is defective.

Check 1 connections, 2 contact at the

 

 

 

 

 

 

connectors and 3 for broken wires in

 

 

 

 

 

 

the following wiring.

 

 

 

 

 

 

 

TB1A~NF~TB1B

 

 

 

 

 

 

 

TB1B~FANCON board~CN04

 

 

 

 

 

 

 

CNMF~MF

 

 

 

 

 

 

 

TB1B~CNTR1

 

 

 

 

 

 

 

CNFC1~CNFC2

 

 

 

 

8)

Fan motor (MF) operation is defec-

Go to “Treating Fan Motor Related

 

 

 

 

 

tive.

Trouble.”

 

 

 

 

9)

The inverter/compressor is defec-

Go to “Treating Inverter/Compressor

 

 

 

 

 

tive.

Related Trouble.”

 

 

 

 

 

 

 

4250

IPM alarm

1 If over current, overheat or

1)

The power supply voltage is abnor-

•

Check if an instantaneous stop or

 

output /

undervoltage of drive cirduit is

 

mal.

 

power failure, etc. has occurred.

 

Bus voltage

detected by IPM during inverter

 

 

• Check if the voltage is the rated

 

abnormality

operation.

 

 

 

 

voltage value.

 

 

 

 

 

 

 

 

 

[Inverter error detail : 1]

2)

The wiring is defective.

Check 1, the connections, 2, contact

 

 

2 If VDC

300 or VDC 760V

 

 

is detected during inverter op-

 

 

at the connectors, 3 tightening torque

 

 

 

 

at screw tightened portions, 4, wiring

 

 

eration.

 

 

 

 

 

 

 

 

polarities, 5, for broken wires, and 6,

 

 

[Inverter error detail : 1]

 

 

 

 

 

 

for grounding in the following wiring.

 

 

3 If IAC

39Arms is detected

 

 

 

 

 

 

 

TB1A~NF~TB1B, TB1A~DS~[52C,

 

 

during inverter operation.

 

 

 

 

 

 

 

 

R1, R5]~[C2, C3]~IPM Wiring

 

 

[Inverter error detail : 11]

 

 

 

 

 

 

 

 

CNDC1 (G / A) ~ CNVDC (INV) Wir-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ing

 

 

 

 

 

 

* Check if the wiring polarities are as

 

 

 

 

 

 

 

shown on the wiring diagram plate.

 

 

 

 

3)

The inverter / compressor is defec-

Go to “Treatment of Inverter/Compres-

 

 

 

 

 

tive.

sor Related Trouble.”

 

 

 

 

 

 

 

 

–114–

Page 115 Page 117
Page 116
Image 116
Mitsubishi Electronics P500YMF-C, PURY-P400 specifications 114
Page 115 Page 117

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.
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