Carrier Bryant Multi-Zone 38MARBQ09 18AA3 Series Bedienungsanleitung

Carrier & Bryant Ductless

Service Manual

Carrier Enterprise

Pub. Date –6.25.2021

Table of Contents

Pages 4 ~ 6 1st Steps in Ductless (DLS)Troubleshooting

Error Page Description

E1 7 All Models

EE 10 40MBD Ducted Water Level

E3 11 40MAQ High Wall Fan Error

13 40MBD Ducted Fan Error

15 40MBQ Ducted Fan Error

E4/E5 17 40MAQ High Wall Sensor Error

40MBD Ducted Sensor Error

40MBQ Ducted Sensor Error

40MBC Cassette Sensor Error

40MBF Floor/Ceiling Sensor Error

F1/F2/F3 20 38MAQB Outdoor Sensor Error

38MAQBR Outdoor Sensor Error

38MARB Outdoor Sensor Error

F5 24 38MAQB Outdoor Fan Error

26 38MAQBR Outdoor Fan Error

27 38MARB Outdoor Fan Error

P4 28 All Single Zone Outdoor Units

Table of Contents (end)

Service Procedures

29 How Ohm a Reactor

30 Compressor Check 1 –How to Meg a Compressor

31 Compressor Check 2 –Ohming a Compressor

32 38MGR Error Code Retrieval

33 Heating & Cooling Compensation

37 Service Settings –Wireless Remote RG10

39 Service Settings –Wireless Remote RG57

41 Service Settings –Wireless Remote RG66

Outdoor Unit PCB Removal Procedures

43 38MARBQ12AA1 Outdoor Units

38MARBQ09~18AA3 Outdoor Units

46 38MARBQ24~36AA3 Outdoor Units

51 38MARBQ24~36AA3 Outdoor Units

55 38MAQB09~12R--1 Outdoor Units

58 38MAQB09~12R--3 Outdoor Units

61 38MAQB18~30---3 Outdoor Units

65 38MGRQ30D--3 Outdoor Units

1st Steps for DLS Troubleshooting

If error is already displayed, make note of it. If Multi-Zone check

each Indoor Unit for error. If no error displayed, wait up to 5

minutes for error to reappear. Some errors are constant retry

and will only appear every 3 to 5 minutes to display again.

During this time either a normal display or an “88” will be seen.

If the system is a Multi-Zone 38MGR36 or 48 go to the

outdoor unit and pull the last error code from the Main PCB.

Procedure is towards the back of this guide. After code is

retrieved go to next step.

Recycle power and try system again. Give the system a

minimum of 10 minutes for error to appear again.

If error appears again, go to the flow chart for the error

displayed and work the error.

Things to check during any troubleshooting service call.

•Power to the units? Within limits?

•All wire harness connected and fully seated in their

sockets?

•Is the end user operating the system correctly?

•Raise or lower the set point (Heat vs. Cool) 5 or more

degrees, wait 10 minutes, system come ON?

On Multi-Zone systems, operate each zone independently first.

Check Heating & Cooling if temperature permits. This will help

rule out cross piping and wiring. Even if the system has been

installed for some time, still check this. It is often missed at the

time of start up.

1st Steps for DLS Troubleshooting (cont.)

If system has no error but still not preforming well, remove the

refrigerant charge (weighing it out) and recharge the system.

Make sure to check the additional charge calculation if one is

needed.

If the end user’s complaint is related to over or under shooting

temperature of the space, the sizing of the equipment to the

application should be checked. Keeping in mind the below.

•Minimum BTU output of the equipment

•Size of the head and the BTU requirements

of the space it is located within.

In some cases the Heating or Cooling Compensation setting can

be adjusted to help off set the temperature over or under

shooting. Explanation and instructions are in this guide.

For Defrost issues the following should be checked first.

•Refrigerant charge

•Equipment sizing to the application

For Defrost issues on systems with a 24-Volt Interface installed

Any outdoor unit made prior to 2.01.2021 may need a main

PCB upgrade. If your unit’s serial number starts 0421V or lower

an upgrade may be needed. Check with CE Tech Support.

1st Steps for DLS Troubleshooting (end)

Tools/Material required for DLS Troubleshooting & Servicing.

All the same tools required for properly installing Ductless

equipment. See CE’s Ductless Install Training for more details.

In addition to the above, the following are a must have.

•A Megger –This is crucial for checking out a

compressor. An Ohm meter is useful, but a Megger

is essential.

•Conductive Grease –This is needed when replacing

some of the PCB’s in the outdoor units. This can be

purchased through CE or online.

•A spare wireless remote control, part numbers:

RG57 –17317000A34063

RG10 –17317000A59628

RG66 –17317000A45681

•Support material from CE or Carrier. Service

Manuals, Product Data. Download to your

electronic device before going to the site.

Error Code

–Indoor / Outdoor Unit Communication Error

Indoor Unit or Wired Control Display

–E1

Dr. Smart Display (Debugger)

–E1

Malfunction decision conditions

The indoor unit cannot communicate with the

outdoor unit

Supposed Causes

• Wiring mistake

• Short

-circuited component

• Indoor Unit PCB

• Outdoor

PCB

Troubleshooting: Error is only displayed every 3 minutes, during this time you may

see either “normal display” or “88” on indoor unit or wired control.

E1 is often seen on the day of start up for a new system. Typically due to an electrical issue

with the field installed wire between the Indoor & Outdoor units. There should be no solid wire

installed between the Indoor & Outdoor, if this was done change this out first. Also make sure

all wire stands are landed in the terminal. Repair connections due to over stripped wires.

Is there a Condensate Pump Safety Switch tied in? Check this first, make sure it has not tripped

and opened up it’s normally closed contacts. The switch can break “L1” or “L2”, do not break “S”.

If E1 still present, turn power OFF and disconnect the field supplied “S” or “3” wire from both

ends. Reapply power and check for induced voltage on the communication wire. With a meter

measure the field supplied “S” or “3” wire to ground. Zero voltage on the communication wire is

preferred. If 20 or more volts are measured and Communication Errors persists, fix or replace all

4 wires.

Once all you have verified the above, proceed below.

DO NOT CHECK IN STANDBY, system must be ON and calling for Heat or Cool.

Set your multimeter to DC Volts.

If no error is displayed, wait a minimum of 8 minutes for error to appear or measuring voltage.

Measure DC voltage, making sure Black Lead from Meter is on N/L2/2, Red Lead is on S/3.

This is very important to do as stated, if not followed the flow chart will not point you in the

proper direction.

If your meter defaults to an Auto Ranging Scale, change to Manual before proceeding, press your

meter’s Range button to select an appropriate scale.

All Models

Indoor Outdoor Unit Communication Error E1 (page 1 of 3)

Continued on next page

All Models

Indoor Outdoor Unit Communication Error E1 (page 2 of 3)

Note: Terminals may be referred to in one of three ways.

L, N, S Or L1, L2, S Or 1, 2, 3

Go to ODU and Measure the DC

voltage between “N/L2/2” and “S/3”

Black Lead to N/L2/2, Red Lead to S/3

Follow the “1st Steps for DLS Troubleshooting” in the beginning of this guide,

if E1 is displayed, procedure below.

Under normal operation voltage will alternate from approximately -50 Volts to +50 Volts.

If your meter has a MIN/MAX setting, we recommend using this. It can quickly show you the

top and bottom of the alternating range.

Replace Indoor PCB.

Check the wiring connection

from indoor terminal to indoor

PCB. Are they OK?

The value is always positive.

The value is fixed and close to 0.

The value is alternative from negative to positive.

Check the wiring connection from outdoor terminal to outdoor

PCB and wiring between PCB’s if there is more than 1 PCB

For ODU’s with 2 PCB’s,

main and IPM (Inverter).

For ODU’s with only 1 PCB

Continued on next page

If after parts

replacement, E1 is still

displayed, contact your

local CE Technical

Support Rep.

All Models

Yes

Check the AC voltage of L, N

output to IPM board. Is it the

same as the power input?

Unplug all the high voltage

components connected to main

PCB (4 way valve, heater(s), fan)

one by one to check their

resistance. Has any component

short circuited or open?

Replace the IPM board.

Replace the main PCB Unplug all the high voltage

components connected to the

main PCB (4-way valve, heater,

AC fan) one by one to check

their resistance. Has any

component short circuit?

Replace the electronic expansion

valve coil & Main PCB

For some models, outdoor PCB cannot be removed separately. In

these cases, the entire outdoor electric control box should be

replaced as a whole. Parts breakdown shows this information.

Yes

Replace short

circuited

component and

main PCB.

Indoor Outdoor Unit Communication Error E1 (page 3 of 3)

Yes

Yes No

Replace the short

circuited component

and the main PCB. Yes

Unplug the electronic expansion

valve. Repower ODU, Check if

the power LED is on.

Unplug the electronic expansion

valve. Repower ODU, Check if

the power LED is on.

Replace the main PCB

Check the wiring connection from outdoor terminal to outdoor

PCB and wiring between PCB’s if there is more than 1 PCB

For ODU’s with 2 PCB’s,

main and IPM (Inverter).

For ODU’s with only 1 PCB

Check that the

power LED is on.

Error Code

–Water Level Switch Activated

Indoor Unit or Wired Control Display

Dr. Smart Display (Debugger)

Error Displayed

Malfunction decision conditions

If the sampling voltage is not 5V

Supposed Causes

• Drain

clogged

• Water level

switch stuck/bad

• Water pump faulty

• Water indoor

unit PCB

Troubleshooting: EE error will lock out the system and display

EE until error is fixed or system restarted

If after parts replacement, error

is still displayed, contact your

local CE Technical Support Rep.

Is there standing water

in drain pan?

Yes

Is drain line for

clogged?

Yes

Replace PCB Pump

is connected to.

Clear drain and

restart system.

Water Level Alarm EE

Check float switch.

If stuck open, repair or replace.

Does internal or external

drain pump have power to

it during Cooling operation?

CN13 220VAC

YesNo

Replace Pump.

40MBDQ09~58--3 Ducted

Follow the “1st Steps for DLS Troubleshooting”

in the beginning of this guide, if you have an

active error, procedure below.

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