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Johnson Controls M Series Installation And Maintenance Manual
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Johnson Controls M Series Installation And Maintenance Manual

Johnson Controls M Series Installation And Maintenance Manual

Inverter-driven air conditioning units
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Download this manual See also: Owner's Manual
Installation and
Maintenance
Manual
"M" SERIES
INVERTER-DRIVEN
AIR CONDITIONING
UNITS
Type
OUTDOOR UNIT
READ AND UNDERSTAND
THIS MANUAL BEFORE
USING THIS INVERTER-
DRIVEN AIR CONDITIONING
UNIT. KEEP THIS MANUAL
FOR FUTURE REFERENCE.
Model
DHM18CMB21S
DHM24CMB21S
DHM30CMB21S
DHM36CMB21S
DHM42CMB21S

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Summary of Contents for Johnson Controls M Series

  • Page 1 Installation and Maintenance Manual "M" SERIES INVERTER-DRIVEN AIR CONDITIONING UNITS Type Model DHM18CMB21S DHM24CMB21S OUTDOOR UNIT DHM30CMB21S DHM36CMB21S DHM42CMB21S READ AND UNDERSTAND THIS MANUAL BEFORE USING THIS INVERTER- DRIVEN AIR CONDITIONING UNIT. KEEP THIS MANUAL FOR FUTURE REFERENCE.

  • Page 2: Important Notice

    Important Notice ● Johnson Controls, Inc. pursues a policy of continuing improvement in design and performance in its products. As such, Johnson Controls, Inc. reserves the right to make changes at any time without prior notice. ● Johnson Controls, Inc. cannot anticipate every possible circumstance that might involve a potential hazard.
  • Page 3 Table of Contents ...........i 2. Installation ........................ . 2.1 Installation Dimension Diagram ..................1 2.2 Installing the Outdoor Unit ....................2 2.3 Electrical Connections .....................4 2.4 Check after Installation .....................7 2.5 Models: 36K/42K.......................8 3. Troubleshooting ....................17 3.1 Malfunction Indicator......................17 3.2 Malfunction Checking and Elimination................18 Appendix: ........................41...

  • Page 4: Important Safety Instructions

    Never bypass or jump-out any safety device or switch. ● Johnson Controls, Inc. will not assume any liability for injuries or damage caused by not following steps outlined or described in this manual. Unauthorized modifications to Johnson Controls products are prohibited as they…...

  • Page 5: Installation Precautions

    Take the following precautions to reduce the risk of property damage. ● Be careful that moisture, dust, or variant refrigerant compounds not enter the refrigerant cycle during installation work. Foreign matter could damage internal components or cause blockages. ● If air filters are required on this unit, do not operate the unit without the air filter set in place. If the air filter is not installed, dust may accumulate and breakdown may result.

  • Page 6: Refrigerant Precautions

    Controls uses only refrigerants that have been approved for use in the unit’s intended home country or market. Johnson Controls distributors similarly are only authorized to provide refrigerants that have been approved for use in the countries or markets they serve. The refrigerant used in this unit is identified on the unit’s faceplate and/or in the associated manuals.

  • Page 7: Electrical Precautions

    under pressure and never open pressurized system parts. ● Before installation is complete, make sure that the refrigerant leak test has been performed. If refrigerant gases escape into the air, turn OFF the main switch, extinguish any open flames and contact your service contractor.
  • Page 8 ● Communication cabling shall be a minimum of 18-Gauge, 2-Conductor, Stranded Copper. Shielded cable must be considered for applications and routing in areas of high EMI and other sources of potentially excessive electrical noise to reduce the potential for communication errors. When shielded cabling is applied, proper bonding and termination of the cable shield is required as per Johnson Controls guidelines.
  • Page 9 DHM18CMB21S Warning Be sure to cut off the power supply before cleaning the air conditioning unit; otherwise electric shock might happen. Wetting of air conditioning unit may cause the risk of electric shock. Do not wash the air conditioning unit in any case. Volatile liquids such as thinner or gasoline will cause damage to the appearance of air conditioning unit.
  • Page 10 Location Use bolts to secure the unit to a flat, solid floor. Tighten the connections using two wrenches working When mounting the unit on a wall or the roof, make in opposite directions. sure the support is firmly secured so that it cannot Caution: Installation Must be Performed in Accordance move in the event of intense vibrations or a strong with the NEC/CEC by Certified Technician Only.
  • Page 11 Use suitable instruments for the refrigerant R410A. Do not use any refrigerant other than R410A. Do not use mineral oils to clean the unit. INSTALLATION DIMENSION DIAGRAM The installation must be done by a trained and certified technician with reliability according to this manual. Contact service center before installation to avoid malfunction due to unprofessional installation.
  • Page 12 DHM18CMB21S 1. R emove the handle at the right side plate of the DHW18CMB21S outdoor unit (six screws). Remove the cable clamp, connect the connection cable and power cable with the terminal at the row of connection and fix the connection. The fitting line distributing must be consistent with the indoor unit terminal of line bank.
  • Page 13 DHM24CMB21S 1. Remove the handle at the right side plate of the outdoor unit (10 screws). Remove the cable clamp, connect the connection cable and power cable with the terminal at the row of connection and fix the connection. The fitting line distributing must be consistent with the indoor unit terminal of line bank.
  • Page 14 DHM30CMB21S connection cable Remove the handle at the right side plate of the outdoor unit (10 screws). connection cable Remove the cable clamp, connect the connection cable and connection cable power cable with the terminal at the row of connection and fix the connection.
  • Page 15 Check Items Problems Owing to Improper Installation Is the installation reliable? The unit may drop, vibrate or make noises Has the gas leakage been checked? May cause unsatisfactory cooling (heating) effect Is the thermal insulation of the unit May cause condensation and water dropping sufficient? May cause condensation and water dropping Is the drainage smooth?
  • Page 16 a certified technician condensate from 32°F ( local and forcefully The gauge of the power cord should be appropriate and in case of damage, it must be replaced with the correct gauge grounding ground with (See notes on next page) DHM36CMB21S DHM42CMB21S...
  • Page 17 104°F ( 194°F ( 104°F ( Grounding conditioning unit grounding conditioning unit is the ground line and cannot be used for other purposes, ground ground DHM36CMB21S OUTDOOR UNIT INDOOR UNIT C INDOOR UNIT D INDOOR UNIT A DHM42CMB21S OUTDOOR UNI T INDOOR UNIT E INDOOR UNIT D INDOOR UNIT C...
  • Page 18 distributor Make metal as possible certified DHM36CMB21S DHM42CMB21S 1087 1015...
  • Page 19 from 4 in. ( ＞1000 ＞500 ＞2000 ＞500 ＞2000 grounding Energy Level Capacity Code Indoor Unit Outdoor Unit between of r runs (please see diagram below).
  • Page 20 Outdoorunit Equivalent length of the farthest fitting pipe L Indoor unit Indoor unit Refrigerant Pipe Allowable Length Allowable Length DHM36CMB21S DHM42CMB21S Total Length(m) Max. Length for Single Unit(m) Max. Outdoor unit and indoor unit(m) installation Indoor unit and indoor unit(m) altitude Table 4: Dimension of the Refrigerant Pipe of the Indoor Unit unit: mm...
  • Page 21 with insulation Diameter Wall Thickness mm Moment of Torque Φ6.35mm 15-30 N·m) Φ9.52mm 0.71 30-40(N·m) Φ12.7mm 45-50(N·m) Φ15.9mm 60-65(N·m) , to make sure there is no Joint of the indoor unit. No gap condensate from condensate from...
  • Page 22 Manometer Manometer “HI” knob “LO” knob Liquid Valve Vacuum pump Hose Gas Valve DHM36CMB21S DHM42CMB21S Model Refrigerant Charge (kg) DHM36CMB21S DHM42CMB21S Model Total Liquid Pipe Length (a+b+c+d+e) Table Example: DHM42CMB21S...
  • Page 23 Serial No. Model Ducted Type DHMW09NDB21S Indoor Unit Ducted Type DHMW09NDB21S Indoor Unit Ducted Type DHMW09NDB21S Indoor Unit Ducted Type DHMW09NDB21S Indoor Unit Ducted Type DHMW18NDB21S Indoor Unit Serial No. Diameter φ6.35 φ6.35 φ6.35 φ6.35 φ9.52 Length Indoor Unit Model Additional Refrigerant Charge(kg) ……...
  • Page 24 Items to be Checked Possible Errors Check Results Has each part and component of the unit been The unit may fall off, vibrate or generate installed securely? noise. The cooling (heating) capacity may be Has the gas leakage test been taken? poor.
  • Page 25 DHM18CMB21S DHM24CMB21S DHM30CMB21S ○ ● Note: : off : on : blink When several malfunctions occur at the same time, they will be displayed in circulation and every malfunction is displayed for 5 seconds. Malfunction description LED1 LED2 LED3 LED4 ○...
  • Page 26 ● ● ● Communication failure with Unit A ● ● Communication failure with Unit B ○ ○ ● Communication failure with Unit C ● ○ ● Communication failure with Unit D ○ ● Unit A freeze protection ○ ● ● Unit B freeze protection ●...
  • Page 27 Flow Chart: Energize the unit Please check: 1. if the indoor and outdoor heat exchanges are dirty, if there is obstacle to affect the radiation; 2. if the indoor and outdoor fans are running If the above cases are existed? normally;...
  • Page 28 (2) PFC protection malfunction Main checking points: ● If the power supply is normal. ● Check if the connection wire of induction is connected well and if the induction is broken. Flow chart: Start Check If the power supply is normal Turn on the unit after the power supply resumes to Power supply is abnormal...
  • Page 29 (3) Capacity charging malfunction Main checking points: If the wiring of the induction is connected well and if the induction is broken. ● ● If the mainboard is broken. Flow chart: Energize the unit and wait for 1 min Test the voltage between the two ends of the electrolytic capacitor with the DC shift of the universal meter...
  • Page 30 (4) Anti-high temperature and overload malfunction Main checking points: ● If the outdoor ambient temperature is within the normal range. ● If the outdoor fan is running normally. ● If the indoor and outdoor radiation environment is good. Flow chart: Start It is a normal protection, please If the outdoor ambient temperature...
  • Page 31 (5) Temperature sensor malfunction Main checking points: If the temperature sensor is damaged or broken. I f the terminal of the temperature sensor is loosended or not connected. I f the mainboard is broken. Flow chart: Start Check whether the wiring terminal between temperature sensor and controller is loosened or poorly contacted? Insert the temperature...
  • Page 32 (6) Start failure malfunction Main checking points: If the connection wire of the compressor is connected properly. I f the stop duration of the compressor is sufficient. I f the compressor is broken. ;If the refrigerant charging amount is too much. Flow chart: Energize and start the unit...
  • Page 33 (7) Communication malfunction Main checking points: If the connection wire between the indoor unit and outdoor unit is connected well, if the wires inside the unit are connected well I f the indoor mainboard or outdoor main board is broken Flow chart: Communication malfunction of some indoor units...
  • Page 34 All the indoor units appear communication malfunction De-energize,check the connection wire of indoor and outdoor unit and the wire of the eletric box is connected correctly Reconnect according to Eliminate the malfunction Connected correctly? the wiring diagram De-energize, check if the connection wire between the outdoor mainboard and the filter board according to the wiring diagram Reconnect according to...
  • Page 35 (8) Compressor overload, diacharge protection malfunction Main checking points: If the eletric expansion valve is connected well or it is broken I f there is refrigerant leakage I f the overload protector is broken Flow chart: Start If the overload protector is connected well? Check the resistance between the two ends of the overload protector in ambient temperature, if the resistance is below 1k...
  • Page 36 (9) Compressor desynchronizing malfunction Main checking points: If the pressure of the system is too high; If the eletric expansion valve is working normally or it is broken; If the radiation of the unit is good; Flow chart: The unit appears desynchronizing as soon as energizing and starting The stop duration of the compressor is longer than 3min?
  • Page 37 DHM36CMB21S DHM42CMB21S an odor your contractor contractor Conditions Causes Corrective Actions Broken fuse or opened breaker. Change the fuse or close the breaker. Power off. Restart the unit when power on. Power supply plug is loose. Plug the power supply properly. The unit does not run Insufficient batteries voltage of the Change new batteries.
  • Page 38 Conditions Causes When restarting the unit soon after The overload protection switch of the it is stopped. unit let the startup delay for three minutes. The unit does not run The unit will stand by for approximate one As soon as power is on. minute.
  • Page 39 High Discharge Flash 4 times Outdoor Temp Protection Outdoor & Communication Error Flash 6 times Indoor Indoor Unit Water Flash 9 times Indoor Full Error Refrigerant Quick Quick Special Mode Recovery Mode Flashing Flashing Outdoor Ambient Flash 3 times Outdoor Temp Sensor Error Outdoor Mid-Coil Flash 4 times...
  • Page 40 Flash 21 Low Voltage Protection Drive Error times Temp Drift Protection Flash 3 times Flash 3 times Flash 3 times Drive Error Drive Board Ambient Flash 3 times Flash 3 times Flash 3 times Drive Error Temp Sensor Error AC Current Protection Flash 5 times Drive Error Flash 17...
  • Page 41 Outdoor Ambient Flash 3 times Outdoor Temp Sensor Error Outdoor Mid-Coil Flash 4 times Outdoor Temp Sensor Error Outdoor Discharge Air Flash 5 times Outdoor Temp Sensor Error Oil Return for Cooling Flash 7 times Special Mode Quick Forced Defrosting Special Mode Flashing Oil Return for Heating...
  • Page 42 Unit n indoor pipe midway temperature Flash twice Indoor Table 16 sensor error Indoor Evaporator Temp Sensor Short/ Flash twice Indoor Table 16 Open-Circuit (Air Valve) Unit n indoor unit pipe Flash 22 times Indoor outlet temperature Table 16 sensor error (Liquid Valve) Unit n indoor pipe Flash 19 times...
  • Page 43 DHM36CMB21S DHM42CMB21S a certified technician please your distributor...
  • Page 44 Malfunction Display: E1 Compressor High Pressure Protection High pressure protection Replace the outdoor Check if the pressure is really high pressure with the Check if pressure switch unit mainboard is abnormal measurement of a manometer Replace pressure switch Refer to Instruction Check if operation mode of indoor unit is Manual of indoor unit properly set...
  • Page 45 Malfunction Display: E3 Compressor Low Pressure Protection Compressor Low Pressure Protection Check if the pressure is really low pressure Refer to the high pressure with the measurement of a manometer protection Charge refrigerant according to the amount Check if the refrigerant in the specified in the nameplate and calculated system is sufficient additional amount...
  • Page 46 Malfunction Display: E4 Compressor Exhaust High Temperature Protection Discharge temperature protection Measure if temperature sensor’s Measure if compressor’s discharge Replace relevant discharge resistance value is correct temperature has reached 115℃ temperature sensor System pipeline leaks. Please add refrigerant Replace the outdoor according to the amount specified in the nameplate unit mainboard Malfunction Display: E5 Compressor Overheat...
  • Page 47 Malfunction Display: E9 Full Water Protection Full Water Protecti o Check if the voltage of liquid Replace the main board of Check if water overflow level switch end is ok the indoor uint Check the liquid level switch Check if the water drainage Check if the voltage of water Replace the main board of pump works...
  • Page 48 Malfunction Display: F3 Failure of Outdoor Ambient Sensor Failure of outdoor Ambient sensor Check the direction of the plug Check if the plug of the temperature sensor is correctly and socket connected with socket on the mainboard Remove the sensor to check if the resistance value is ok Replace temperature sensor Replace mainboard of the indoor uint Malfunction Display: F5 Failure of Exhaust Temp.
  • Page 53 Product improvement, specifications and appearance in this manual are subject to change without prior notice. LIT-12012176 © Johnson Controls, Inc. USA...

This manual is also suitable for:

Dhm18cmb21sDhm30cmb21sDhm36cmb21sDhm42cmb21sDhm24cmb21s