Mitsubishi Heavy Industries FDTA Series 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 FDTA Series Specifications

General

Brand	Mitsubishi Heavy Industries
Model	FDTA Series
Category	Air Conditioner
Language	English

Summary

2 SELECTION DATA

2.1 Specifications

Lists detailed technical specifications for the FDT series indoor units FDTA151, 201, and 251.

2.1 Specifications (b) Ceiling suspension type (FDEN)

Lists detailed technical specifications for FDEN series indoor units FDENA151, 201, and 251.

2.1 Specifications (c) Wall mounted type (FDKN)

Lists detailed technical specifications for FDKN series indoor units FDKNA151 and 251.

2.1 Specifications (d) Ceiling mounted duct type (FDUR)

Lists detailed technical specifications for FDUR series indoor units FDURA201 and 251.

2.1 Specifications (2) Outdoor unit

Lists detailed technical specifications for FDCA301HEN and FDCA301HES outdoor units.

2.2 Range of usage & limitations

(2) Remote controller (Optional parts) (a) Wired remote controller

(b) Wireless remote controller (Optional parts)

2.6 Piping system

2.7 Selection chart

Provides a chart for selecting units based on operating conditions and capacity.

3 ELECTRICAL DATA

3.1 Electrical wiring (a) Wired remote controller

Illustrates the electrical wiring diagram for FDT series indoor units with wired remote controllers.

(b) Ceiling suspension type (FDEN) Models All models

Shows the electrical wiring diagram for FDEN series indoor units.

(c) Wall mounted type (FDKN) Models FDKNA151,201,251

Illustrates the electrical wiring diagram for FDKN series indoor units FDKNA151, 201, 251.

(d) Ceiling mounted duct type (FDUR) Models FDURA201, 251

Shows the electrical wiring diagram for FDUR series indoor units FDURA201, 251.

4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(1) Remote controller (a) Wired remote controller

Explains the operation and functions of the wired remote controller, including its display and buttons.

(b) Wireless remote controller

Describes the wireless remote controller's display, buttons, and operation modes.

(2) Operation control function by the indoor controller (a) Room temperature control (Differential of thermostat)

Details how the indoor controller manages room temperature control via thermostat differential.

(b) Automatic operation

(d) Dehumidifying operation (“THERMAL DRY”)

(f) Hot start (Cold draft prevention during heating)

(g) FM control with the heating thermostat turned off (For cold draft prevention)

(k) Condensate pump motor (DM) Control [FDT and FDUR models only]

(m) Compressor inching prevention control

(n) Heating overload porotection

(o) Frost prevention during cooling, dehumidification

(p) Thermistor (Return air, heat exchanger) disconnected wire detection.

5 APPLICATION DATA

SAFETY PRECAUTIONS

Provides critical safety warnings and cautions for installation and handling of the equipment.

5.1 Installation of indoor unit (a) Selection of installation location

(d) Drain Piping

9) Drainage test

5.2 Installation of remote controller

(a) Selection of installation location

(b) Installation procedure a) Exposed fiting

b) Recessed fitting

5.3 Installation of outdoor unit

(b) Selection of installation location

(2) Refrigerant piping work

(a) Decision of piping specification (i) Twin type Models FDCA301~601 [Branch pipe set : DIS-WA1]

Details refrigerant piping specifications, including branch pipe sets, for twin type outdoor units FDCA301-601.

(b) Flare processing

6 MAINTENANCE DATA

6.1 Evacuation

Describes the process of evacuation using a vacuum pump to remove impurities from the refrigerant system.

(2) Refrigerant charging (a) After the evacuation shown in the above, change the connection of the charge hose A to the refrigerant cylinder.

Details the steps for refrigerant charging, including purging air and checking for leaks.

6.2 Trouble shooting for refrigerant circuit (1) Judgement of operating condition by operation pressure and temperature difference

Guides on judging refrigerant circuit conditions based on pressure and temperature differences.

(a) Check Indicator Table

2) Outdoor unit side

3) Timing of error detection ● Indoor unit side.

● Outdoor unit side.

(b) Replacement procedure of indoor unit microcomputer printed circuit board.

6.3 Diagnosing of microcomputer circuit

1) Selfdiagnosis function (a) Check Indicator Table

A comprehensive table correlating remote controller error codes with LED status and causes for indoor and outdoor units.

2) Outdoor unit side

Lists error codes and their corresponding LED indications and causes specific to the outdoor unit.

3) Timing of error detection ● Indoor unit side.

● Outdoor unit side.

(2) Procedures of trouble diagnosis

3) Error diagnosis procedures at the indoor unit side

6.4 Check display on wireless specification models (FDEN · FDKN)

(1) Indication board (a) FDEN Series

(b) FDKN Series

8 Troubleshooting

1 Error display : E5 [Communications error during operation]

Guides troubleshooting for communication errors between indoor and outdoor units based on LED indicators and error codes.

2 Error display : E32 [Power supply phases reversed]

Details troubleshooting steps for power supply phase reversal errors, including LED indications and checks.

3 Error display : E33 [Compressor overcurrent trouble]

Explains how to diagnose and resolve compressor overcurrent issues based on voltage and LED indicators.

4 Error display : E34 [Open phase at L3 phase of 52C secondary side]

Guides troubleshooting for open phase errors at the L3 phase of the 52C secondary side.

5 Error display : E35 [Cooling overload operation]

Provides troubleshooting steps for cooling overload operation, checking thermistor characteristics and conditions.

6 Error display : E36 [Discharge temperature error]

Details troubleshooting for discharge temperature errors, checking thermistor characteristics and control status.

7 Error display : E37 [Defective outdoor unit heat exchanger thermistor]

Explains troubleshooting for defective outdoor heat exchanger thermistor, including resistance checks.

8 Error display : E38 [Defective outdoor air temperature thermistor]

Guides troubleshooting for defective outdoor air temperature thermistor, including resistance checks.

9 Error display : E39 [Defective discharge pipe thermistor]

Details troubleshooting for defective discharge pipe thermistor, including resistance checks.

10 Error display : E40 [63H1 operation]

Explains troubleshooting for 63H1 operation errors, checking fan motor, space, and service valve status.

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

Guides troubleshooting for low pressure errors, checking sensor connections, refrigerant levels, and PCB.

12 Error display : E52 [52C Abnormal]

Details troubleshooting for 52C abnormal conditions, checking remote controller display and unit status.

13 Error display : E53 [Defective suction pipe thermistor]

Explains troubleshooting for defective suction pipe thermistor, including resistance checks.

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

Guides troubleshooting for defective low and high pressure sensors, checking connections and pressure readings.

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

Details troubleshooting for defective under-doom thermistor, including resistance checks.

16 Error display : E57 [Insufficient refrigerant volume.]

Explains troubleshooting for insufficient refrigerant, checking service valves and thermistor characteristics.

(4) Error diagnosis procedures at the outdoor units side

(b) Replacement procedure of outdoor unit microcomputer printed circuit board.

(9) Test run

(a) Carry out test operation from outdoor units.

(b) Trial operation from a remote controller