Mitsubishi Heavy Industries FDKNA301 User Manual

MULTI-TYPE
PACKAGED AIR-CONDITIONER
(Split system, Air to air heat pump type)
Collection data
Manual No. '04•M-T-089
(OUTDOOR UNIT) (INDOOR UNIT)
FDCA301HEN
301HES
401HEN
401HES
501HES
601HES
801HES
1001HES
FDTA151
201
251
301
401
501
FDENA151
201
251
301
401
501
FDKNA151
201
251
301
FDURA201
251
301
401
501

Mitsubishi Heavy Industries FDKNA301 Specifications

General

Brand	Mitsubishi Heavy Industries
Model	FDKNA301
Category	Air Conditioner
Language	English

Summary

2 SELECTION DATA

2.1 Specifications

Lists detailed specifications for various indoor and outdoor unit models.

3 ELECTRICAL DATA

3.1 Electrical wiring

Provides wiring diagrams and component explanations for indoor unit (FDT series).

2.6 Piping system

(1) Twin type

Details the piping system for twin type outdoor units (FDCA301-601) and (FDCA801-1001).

2.7 Selection chart

(3) Correction of cooling and heating capacity in relation to one way length of refrigerant piping

Details capacity correction factors based on equivalent piping length and pipe diameter.

4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(n) Heating overload porotection

Details protection against heating overload based on heat exchanger temperature.

(q) Using 1 remote controller to control multiple units (indoor units - up to 16 units)

(d) Defrosting

1) Defrosting start conditions

Lists conditions required for initiating defrosting operation.

(e) Compressor protection control

(i) Compressor overcurrent protection

Explains compressor overcurrent protection mechanisms and abnormal stops.

(v) High pressure control

Models FDCA301~601 only

Models FDCA801, 1001 only

2) Abnormality detection control using the high pressure switch (63H1)

Explains abnormality detection using the high pressure switch for FDCA801, 1001.

3) Abnormal high pressure control using the outdoor heat exchanger temperature (Tho-R1, R2)

Details abnormal high pressure control based on outdoor heat exchanger temperature for FDCA801, 1001.

(vi) Abnormal low pressure detection control (FDCA801, 1001 only)

1) The compressor is stopped when the following conditions are satisfied.

Lists conditions for stopping the compressor due to low pressure.

(f) Detection of disconnected wires in temperature thermistors (...) and low pressure sensor.

1) Outdoor heat exchanger temperature thermistor, outside air temperature thermistor and low pressure sensor

Describes detection of faults in outdoor heat exchanger, air temp thermistors, and low pressure sensor.

2) Discharge pipe temperature thermistor, suction pipe temperature thermistor, under-dome temperature thermistor

Describes detection of faults in discharge, suction, and under-dome thermistors.

5 APPLICATION DATA

SAFETY PRECAUTIONS

Outlines essential safety precautions for installation and operation, divided into WARNING and CAUTION.

5.1 Installation of indoor unit

(d) Drain Piping

Covers drain hose connection, installation, and piping requirements.

(2) Ceiling suspension type (FDEN)

(d) Procedure for making hole on the wall

5.3 Installation of outdoor unit

(1) Installation

(2) Refrigerant piping work

(a) Decision of piping specification

Guides on selecting refrigerant piping specifications based on indoor units and installation.

(i) Twin type

Details piping specifications and branch pipe sets for twin type systems.

(b) Flare processing

4) Tighten a flare joint securely...

(d) Refrigerant pipe connection (Models FDCA 301~601 only)

Explains refrigerant pipe connection procedures for FDCA 301-601 models.

(3) Air tightness test and air purge

(a) Air tightness test

Describes the procedure for conducting an air tightness test using nitrogen gas.

(b) Air purge

Explains the air purge procedure after vacuuming to remove air and moisture.

(4) Refrigerant charge

FDCA301~601 Models

Covers factory charge and additional charge calculation for FDCA301-601.

FDCA801, 1001 Models

Details additional refrigerant charge amounts for FDCA801, 1001 models.

(6) Drain piping work (Models FDCA301~601 only)

Execute drain piping by using a drain elbow...

(7) Electrical wiring

(a) Selection of size of power supply and interconnecting wires.

Guides on selecting appropriate power supply and interconnecting wire sizes and circuit protection.

(b) Wiring connection.

Explains wiring connections for indoor, outdoor units, and remote controllers, including master/slave setup.

(c) Plural Master / Slave setting

(d) Remote controller wiring and connection procedure

(9) Test run

(a) Carry out test operation from outdoor units.

Details test run procedures using switches on the outdoor unit.

(b) Trial operation from a remote controller

Explains how to perform cooling test operation using the remote controller.

6 MAINTENANCE DATA

6.1 Servicing

Explains the evacuation procedure using a vacuum pump to remove impurities.

(1) Evacuation

Explains the evacuation procedure using a vacuum pump to remove impurities.

(2) Refrigerant charging

6.2 Trouble shooting for refrigerant circuit

Provides guidance on judging refrigerant circuit issues based on pressure and temperature readings.

(1) Judgement of operating condition by operation pressure and temperature difference

Provides guidance on judging refrigerant circuit issues based on pressure and temperature readings.

6.3 Diagnosing of microcomputer circuit

(1) Selfdiagnosis function

Explains how to use self-diagnosis through LED indicators and error codes for indoor and outdoor units.

(b) Display sequence of error, inspection display lamp

(2) Procedures of trouble diagnosis

Outlines a systematic approach to diagnosing and resolving errors.

(3) Error diagnosis procedures at the indoor unit side

Provides detailed procedures for diagnosing errors on the indoor unit side.

1 Error display : e5 [Communications error during operation]

2 Error display : e32 [Power supply phases reversed]

3 Error display : e33 [Compressor overcurrent trouble]

4 Error display : e34 [Open phase at L3 phase of 52C secondary side]

5 Error display : e35 [Cooling overload operation]

6 Error display : e36 [Discharge temperature error]

7 Error display : e37 [Defective outdoor unit heat exchanger thermistor]

8 Error display : e38 [Defective outdoor air temperature thermistor]

9 Error display : e39 [Defective discharge pipe thermistor]

10 Error display : E40 [63H1 operation]

11 Error display : E49 [Abnormal low pressure or low pressure sensor wire disconnected]

12 Error display : E52 [52C Abnormal]

13 Error display : E53 [Defective suction pipe thermistor]

14 Error display : E54 [Defective low pressure and high pressure sensor]

15 Error display : E55 [Defective under-doom thermistor]

16 Error display : E57 [Insufficient refrigerant volume.]

(d) How to advance checks for each faulty symptom

(i) Inspection method when there is no error display

Provides inspection steps for a non-operating louver motor.

(6) Control of a plural number of indoor units with one remote controller