Why is my Mitsubishi Electric SUZ-KA09NAHZ air conditioner not producing cool air?

If your air conditioner is not producing cool air, consider the following potential issues and solutions:Closed valve: If a closed valve is detected by compressor current, check the stop valve.Outdoor refrigerant system abnormality: If a closed valve and air trapped in the refrigerant circuit are detected, check for a gas leak in the connecting piping, check the stop valve, and refer to "10-5. Check of outdoor fan motor".Low discharge temperature protection: If the discharge temperature thermistor has been 122°F (50°C) or less for 20 minutes, check the refrigerant circuit and refrigerant amount, and refer to "10-5. Check of LEV".Frequency drop by defrosting in COOL mode: If the indoor coil thermistor reads 46°F (8°C) or less in COOL mode, check if indoor filters are clogged, if refrigerant is short, or if indoor/outdoor unit air circulation is short cycled. For more information, see page 16 of the manual.

What should I do if my Mitsubishi Electric SUZ-KA09NAHZ air conditioner will not turn on?

If your air conditioner will not turn on, you should first check the power supply. Ensure the power supply voltage is correct. Also, verify the indoor/outdoor connecting wire for miswiring. If the OPERATION INDICATOR lamp is blinking ON and OFF, it indicates an abnormality. Before servicing, check that the connector and terminal are connected properly. For more information, see page 15 of the manual.

How do I perform a reset on my Mitsubishi Electric SUZ-KA09NAHZ air conditioner?

You can reset the error history by accessing the self-diagnosis menu:Select Service from the Main menu, then Check from the Service menu, and Diagnosis from the Check menu.Select Self check with the F1 or F2 button, and press the SELECT button.Enter the refrigerant address with the F1 or F2 button and press the SELECT button.Once the check code and unit information appear (or if "-" appears indicating no error history), press the F4 button (Reset) on the screen that shows the error history.A confirmation screen will appear. Press the F4 button (OK) to delete the error history. For more information, see page 17 of the manual.

My Mitsubishi Electric SUZ-KA09NAHZ air conditioner keeps turning off; what could be the problem?

If your air conditioner keeps turning off, it could be due to several issues:Overcurrent protection cut-out: If this operates 3 consecutive times within 1 minute after the compressor starts, reconnect the compressor connector and refer to "10-5. How to check inverter/compressor".Discharge temperature overheat protection: If the discharge temperature thermistor exceeds 240°F and the compressor stops, it can restart if the temperature reads 212°F or less 3 minutes later. Check the refrigerant circuit and refrigerant amount.Fin temperature/P.C. board temperature thermistor overheat protection: If the fin temperature thermistor exceeds 162 to 187°F or the P.C. board temperature thermistor exceeds 162 to 185°F, check around the outdoor unit and the outdoor unit air passage.Indoor coil thermistor overheat protection: If the indoor coil thermistor exceeds 158°F in HEAT mode or the defrost thermistor exceeds 158°F in COOL mode, check the refrigerant circuit and refrigerant amount, and check the stop valve. For more information, see page 16 of the manual.

How do I use the remote control for my Mitsubishi Electric SUZ-KA09NAHZ air conditioner?

The remote control can be used for self-diagnosis and function settings. To perform a malfunction-diagnosis using the IR wireless remote controller:Press the CHECK button twice. "CHECK" lights, and refrigerant address "00" blinks.Press the TEMP buttons to select the refrigerant address of the indoor unit for self-diagnosis.Point the remote controller at the sensor on the indoor unit and press the HOUR button. If an error occurs, the indoor unit's sensor will emit an intermittent buzzer sound, the operation lamp will blink, and the check code will be output.Point the remote controller at the sensor on the indoor unit and press the ON/OFF button to cancel the check mode.To adjust function settings using a wired remote controller: Select Service from the Main menu, then Setting from the Service menu, and Function setting from the Setting menu. Set the indoor unit refrigerant addresses and unit numbers with the F1 through F4 buttons, then press the SELECT button. Use the F1 or F2 button to select the mode number and change the setting number with the F3 or F4 button. Press the SELECT button to send the setting data to the indoor units.

Why is my Mitsubishi Electric SUZ-KA09NAHZ air conditioner not providing heat?

If your air conditioner is not providing heat, consider the following potential issues and solutions:Discharge temperature thermistor shorts or opens: If this occurs during compressor running, refer to "10-5. Check of outdoor thermistors".Fin temperature thermistor, defrost thermistor, P.C. board temperature thermistor, outdoor heat exchanger temperature thermistor or ambient temperature thermistor shorts or opens: If this occurs during compressor running, refer to "10-5. Check of outdoor thermistors".Frequency drop by high pressure protection: If the indoor coil thermistor exceeds 131°F (55°C) in HEAT mode, check if indoor filters are clogged, if refrigerant is short, or if indoor/outdoor unit air circulation is short cycled. For more information, see page 16 of the manual.

What are common reasons for water leakage from a Mitsubishi Electric SUZ-KA09NAHZ unit?

Common reasons for water leakage from the unit include:Drain sensor error or Float switch connector open.Drain pump error. For more information, see page 20 of the manual.

How do I adjust the settings on my Mitsubishi Electric SUZ-KA09NAHZ air conditioner?

You can adjust settings using a wired remote controller by following these steps:Select Service from the Main menu and press the [SELECT] button.When the Service menu appears, you will be prompted for a password. Enter the current maintenance password (four numerical digits) by moving the cursor with the F1 or F2 button and setting each number with the F3 or F4 button. Then, press the [SELECT] button.Once the password matches, the Service menu will appear. Select Function setting from the Service menu and press the [SELECT] button.Set the indoor unit refrigerant addresses and unit numbers with the F1 through F4 buttons, then press the [SELECT] button] to confirm the current setting.After data collection, the current settings will appear highlighted. Use the F1 or F2 button to move the cursor to select the mode number, and change the setting number with the F3 or F4 button.When settings are complete, press the [SELECT] button] to send the setting data to the indoor units.

Where can I find a list of diagnostic error codes for the Mitsubishi Electric SUZ-KA09NAHZ?

A list of diagnostic error codes, along with their corresponding LED indications, symptoms, and remedies, can be found in the "10-2. TROUBLESHOOTING CHECK TABLE" and the "Output pattern A" and "Output pattern B" sections. These tables detail the number of blinks/beeps in the pattern to indicate the check code.

What is the acceptable outdoor operating temperature range for the Mitsubishi Electric SUZ-KA09NAHZ?

The acceptable outdoor operating temperature ranges for the SUZ-KA09NAHZ air conditioner, based on rating conditions, are:Cooling: 95°F D.B. (75°F W.B.)Heating: 47°F D.B. (43°F W.B.) For more information, see page 3 of the manual.

What are the typical noise levels (in dB) of the Mitsubishi Electric SUZ-KA09NAHZ air conditioner?

The typical sound level for the SUZ-KA09NAHZ air conditioner is:Cooling: 54 dB(A)Heating: 55 dB(A) For more information, see page 3 of the manual.

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Specification - Mitsubishi Electric Suz-Ka09Nahz Service Manual

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Installation manual (20 pages)

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Table of Contents

SPECIFICATION

Outdoor unit model

Power supply

Max. fuse size (time delay)

Min. circuit ampacity

Fan motor

Model

Compressor

Refrigeration oil oz. (Model)

Refrigerant control

Cooling

Sound level

Heating

Defrost method

Dimensions

Weight

External finish

Control voltage (by built-in transformer)

Refrigerant piping

Liquid

Refrigerant pipe size

(Min. wall thickness)

Gas

Indoor

Connection method

Outdoor

Height difference

Between the indoor &

outdoor units

Piping length

Refrigerant charge (R410A)

Note: Test conditions are based on AHRI 210/240.

Rating conditions

(Cooling) — Indoor: 80˚F D.B., 67˚F W.B., Outdoor: 95˚F D.B., (75˚F W.B.)

(Heating) — Indoor: 70˚F D.B., 60˚F W.B., Outdoor: 47˚F D.B., 43˚F W.B.

OPERATING RANGE

(1) POWER SUPPLY

Rated voltage

208/230 V

Outdoor unit

OCH709A

V , phase , Hz

F.L.A

R.L.A

L.R.A

dB(A)

VDC

Guaranteed voltage (V)

Min. 187

1 phase

60 Hz

SUZ-KA09

SUZ-KA12

NAHZ

208/230 , 1 , 60

0.67

SNB130FHBM2T

10.0

12.5

22.0 (FV50S)

Linear expansion valve

Reverse cycle

129

Munsell 3Y 7.8/1.1

1/4 (0.0265)

3/8 (0.0285)

3 lb. 9 oz.

208

230

Max. 253

SUZ-KA15

NAHZ

1.00

SNB220FQGMT

13.0

16.0

23.7 (FV50S)

33-1/16

34-5/8

131

12 - 24

Not supplied

1/4 (0.0265)

1/2 (0.0285)

Flared

3 lb. 12 oz.

SUZ-KA18

NAHZ

100

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SPECIFICATION

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