1. Manuals
  2. Brands
  3. Frigicoll Manuals
  4. Air Handlers
  5. AHUKZ-00F
  6. Service manual

Frigicoll AHUKZ-00F Service Manual

Air handling unit application kit
Hide thumbs Also See for AHUKZ-00F:
Table of Contents

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
Air Handling Unit Application Kit
AHUKZ-00F (KAHU-90.5)
AHUKZ-01F (KAHU-200.5)
AHUKZ-02F (KAHU-360.5)
AHUKZ-03F (KAHU-560.5)
Original manual.
Frigicoll reserves the right to discontinue or change specification or designs at any time
without notices and without incurring obligations.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the AHUKZ-00F and is the answer not in the manual?

Questions and answers

Related Manuals for Frigicoll AHUKZ-00F

Summary of Contents for Frigicoll AHUKZ-00F

  • Page 1 SERVICE MANUAL Air Handling Unit Application Kit AHUKZ-00F (KAHU-90.5) AHUKZ-01F (KAHU-200.5) AHUKZ-02F (KAHU-360.5) AHUKZ-03F (KAHU-560.5) Original manual. Frigicoll reserves the right to discontinue or change specification or designs at any time without notices and without incurring obligations.

  • Page 3: Table Of Contents

    VRF AHU Kit CONTENTS 1 Introduction ....................2 2 System Layout ................... 3 3 VRF-AHU System Schematic ............... 4 4 Product Lineup ..................4 5 Nomenclature ................... 5 6 Typical Applications ................... 5 7 Main PCB Ports ..................7 8 Dip Switch Definitions ................10 9 Piping Diagrams ..................

  • Page 4: Introduction

    VRF AHU Kit 1 Introduction The AHU Kit can be connected to the heat pump/heat recovery/cooling only ODU and the third-party AHU. Every third-party AHU can be connected to one AHU Kit or to several AHU Kites in a parallel connection (up to four). This manual describes how to install and operate an AHU Kit.

  • Page 5: System Layout

    VRF AHU Kit 2 System Layout B C N B C N Air supply A u t o S e t T e m p H u m i d i t y C o o l Air return/ D r y F a n H e a t A u t o S w i n g...

  • Page 6: Vrf-Ahu System Schematic

    The system is composed by largely indoor and outdoor parts. Outdoor part is Frigicoll VRF outdoor unit. Indoor part concludes other brand direct expansion type AHU (Local supply) and Frigicoll AHU VRF AHU Kit. AHU Kit forms the connection between Frigicoll VRF outdoor unit and other brand or Frigicoll brand direct expansion type AHU.

  • Page 7: Nomenclature

    VRF AHU Kit 5 Nomenclature Design Code Connected-AHU's Capacity Index 00: 2.2-9kW 01: 9-20kW 02: 20-36kW 03: 36-56kW VRF AHU Kit 6 Typical Applications 6.1 Single VRF AHU Kit connect to one AHU Multiple kits are connected in parallel, and the refrigerant is connected to the AHU heat exchanger after converging through the branch joint.
  • Page 8 VRF AHU Kit 6.2 Multiple VRF AHU Kites connect with one AHU Multiple kits are connected in parallel, and each kit corresponds to a heat exchanger of the AHU. A maximum of four kits can be connected in parallel. The system connection is shown in the figure below: Figure 5-1.2: Multiple VRF AHU Kites connect to one AHU Notes: The example is just for application illustration.

  • Page 9: Main Pcb Ports

    VRF AHU Kit 7 Main PCB Ports Figure 7-1.1: Main PCB Ports...
  • Page 10 VRF AHU Kit Label in Figure 7- Port code Content Port voltage PCB power supply input 220 V~ AC CN47-2 HIGH Fan speed power input-HIGH 220 V~ AC CN48-1 MIDDLE Fan speed power input-MIDDLE 220 V~ AC CN48-2 Fan speed power input-LOW 220 V~ AC CN49 PUMP...
  • Page 11 VRF AHU Kit Label in Label in Figure Figure 7- Port code Content Port voltage 7-1.1 CN21 P Q E Connect to the ODU communication interface P/Q/E 2.5-2.7V DC Master-slave independent Kit communication CN24 C1 C2 E 2.5-2.7V DC interface D1(X) D2(Y) Connect to the main wired controller supplied by CN22...

  • Page 12: Dip Switch Definitions

    VRF AHU Kit 8 Dip Switch Definitions Definitions of each bit of SW1: ● SW1-1 is 0: shutdown compensation temperature (cooling) is 0⁰C (factory default) ● SW1-1 is 1: shutdown compensation temperature (cooling) is 2⁰C (outlet air temperature control is invalid) Valid for the master unit only ●...
  • Page 13 Definitions of each bit of SW2: ● SW2-1 is reserved ● SW2-2 is 0 and SW4-3, SW4-4 is 00: Energy demand/fan speed/mode all adopt Frigicoll controller mode. SW2-2 is 0 and SW4-3, SW4-4 is 01: ● Energy demand: input energy demand gear value 0-10V through third-party controller.
  • Page 14 ● SW3-3 and SW3-4 are 01: temperature ● SW3-3 and SW3-4 are 01: Outlet air compensation in heating mode is 2⁰C. (By temperature control is invalid. (By Frigicoll Frigicoll Controller) Controller) Valid for the master unit only ●...
  • Page 15 VRF AHU Kit Definitions of each bit of SW4: ● SW4-1 is 0: return air temperature control (factory default) ● SW4-1 is 1: outlet air temperature control Valid for the master unit only ● SW4-2 indicates high bit (ON indicates + 16) ●...
  • Page 16 VRF AHU Kit Definitions of each bit of SW9: ● SW9-2 is 0: mode 1 of AHU Kit connecting to valve body in parallel (one coil is connected to multiple Kites; shielding faults from the slave unit's temperature sensors T1, T2, T2A, T2B and TA) (factory default) ●...
  • Page 17 VRF AHU Kit Definitions of each bit of SW10: ● 00: AHUKZ-00F (KAHU-90.5) model ● 01: AHUKZ-01F (KAHU-200.5) model ● 10: AHUKZ-02F (KAHU-360.5) model ● 11: AHUKZ-03F (KAHU-560.5) model Note: The DIP switches of AHUKZ-04D and AHUKZ-05D are the same with that of AHUKZ-03D: 11. Therefore, they need to be differentiated with the capability code.

  • Page 18: Piping Diagrams

    VRF AHU Kit 9 Piping Diagrams AHUKZ-00F (KAHU-90.5) / AHUKZ-01F (KAHU-200.5)/ AHUKZ-02F (KAHU-360.5) / AHUKZ-03F (KAHU-560.5) Key components: 1. Electronic Expansion Valve (EXV): Controls refrigerant flow and reduces refrigerant pressure. 2. Filter: Protects the EXV. Prevents the rust and dust going into the EXV.

  • Page 19: Wiring Diagram

    VRF AHU Kit 10 Wiring Diagram AHUKZ-00F (KAHU-90.5) / AHUKZ-01F (KAHU-200.5) / AHUKZ-02F (KAHU-360.5)/AHUKZ-03F (KAHU-560.5) Figure 12-10.1 wiring diagram...

  • Page 20: Troubleshooting

    VRF AHU Kit 11 Troubleshooting 11.1 Error Code Priority Definition Displayed Content Emergency stop R32 refrigerant leaks, requiring shutdown immediately Outdoor unit fault The AHU Kit slave unit fault Self-check fault MS (refrigerant flow direction switching device) fault Mode conflict 1# EEV coil fault 2# EEV coil fault Water level switch alarm...

  • Page 21: Spot Check

    VRF AHU Kit 11.2 Spot Check Display panel is checked with wired controller No. Parameter displayed on the wired controller during Kit check IDU address (If there are multiple addresses, they are displayed one by one every 0.5s) Capacity HP of IDU (When multiple units are connected in parallel, the total HP of master and slave units is displayed) Set temperature value or set voltage value Set temperature value or input capacity gear value executed by the program T0 temperature (supply air temperature control) or T1 temperature (return air temperature)
  • Page 22 VRF AHU Kit 11.3 General Ø Sections 11.2 and 11.3 describe some initial troubleshooting steps that can be taken when an error occurs. If these steps do not resolve the issue, arrange for a professional technician to investigate the problem. Do not attempt further investigations or troubleshooting yourself.
  • Page 23 VRF AHU Kit 11.4 A01 – Emergency shutdown Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: stop running, displaying code "A01" (V6 platform indoor unit displays "A0" code) Error impact ODU of the same system: stop running, displaying code "A01"...
  • Page 24 VRF AHU Kit 11.5 A11 - R32 refrigerant leaks, requiring shutdown immediately Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: The fan operates at the highest speed, the EEV is closed (Note: Fault persists after power on again), and buzzer of the display control board of the faulty IDU and buzzer of wired controller connected to the faulty IDU keep beeping.
  • Page 25 VRF AHU Kit leakage fault is effective, if the communication abnormality between indoor unit main control board, adapter board and R32 refrigerant detection device control board lasts for more than 2 minutes (see "C79" fault handling in this manual for the communication abnormality handling method between indoor unit main control board and adapter board, and see R32 refrigerant detection device control board operation and installation manual for the communication abnormality handling method between adapter board and R32 refrigerant detection device control...
  • Page 26 VRF AHU Kit standard saturation pressure (see Table of Ambient Temperature and Standard Saturation Pressure of R32 attached to this manual), confirm whether there is a refrigerant leak by using refrigerant testing instruments. If it is determined that there is a refrigerant leak, please operate the refrigerant leak handling procedure above.

  • Page 27: Troubleshooting

    VRF AHU Kit 11.6 A51 - ODU fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU and other IDUs of the same system: The fan continues running, the EEV is closed, and code "A51" is displayed (V6 platform IDU displays the code "Ed") ODU of the same system: Error impact stops.
  • Page 28 VRF AHU Kit 11.7 A74 - The error of the AHU Kit slave unit is sent to the master unit Note: When multiple AHU Kits are connected in parallel, the master AHU Kit (referred to as the master) communicates with the ODU, and the slave AHU Kit (referred to as the slave) communicates with the master unit.
  • Page 29 VRF AHU Kit 11.8 A81 - Self-check fault Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: stops. Other IDUs of the same system: IDUs that share the same MS with the faulty IDU will stop operating, while other IDUs remain in operation.
  • Page 30 VRF AHU Kit 11.9 A82 - MS (refrigerant flow direction switching device) fault Digital display Display position Faulty IDU Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: IDUs that share the same MS with the faulty IDU: The fan continues running, and the EEV is closed.
  • Page 31 VRF AHU Kit 11.10 A91 - Mode conflict (V6 communication protocol adopted) Digital display Display position Panel, display box, and wired controller Error display (Note: Error codes are displayed 2 minutes after faults are triggered) Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: Error impact operate normally.
  • Page 32 VRF AHU Kit 11.12 b11, b13 - Error in 1# electronic expansion valve coil, error in 2# electronic expansion valve coil Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 33 VRF AHU Kit 1. The error code corresponds to the following two situations: a. If there is only one electronic expansion valve port on the main control board of the IDU, when an error occurs in the electronic expansion valve coil connected to the EEV port, the error code is b05. b.
  • Page 34 VRF AHU Kit 11.13 b36 - Water level switch alarm error Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. The water level switch alarm is triggered when the floater of the water level switch rises to the warning water Error trigger level and lasts for 5 min.
  • Page 35 VRF AHU Kit 1. The plug attached to the WATER port of the main control board corresponds to the following two cases: a. The factory default of IDUs without a water level switch uses a short-circuit plug to seal the WATER port. b.
  • Page 36 VRF AHU Kit 11.14 C11 - Duplicate IDU address code Digital display Display position Panel or display box Wired controller Error display Error code and address Error code and address code are displayed code flash simultaneously alternately (2) Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: The fan continues running, the EEV is closed, and error code "A51"...
  • Page 37 VRF AHU Kit Note: 1. The following table shows the number of addresses and address codes for any indoor unit (AHU kit/direct expansion unit not applicable) with different capacities (HP) Address code to be queried at the Nominal Number of Number of centralized capacity...
  • Page 38 VRF AHU Kit ★Example: If one IDU is 5 HP and the address code is set to 1, then the query address at the centralized controller side or wired controller side is 1. If one IDU is 20 HP and the address code is set to 5, then this IDU has four address codes, which are 5, 6, 7, and 8, but the query address at the centralized controller side or wired controller side is 5.
  • Page 39 VRF AHU Kit 11.15 C21 - Abnormal communication between IDU and ODU Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: The fan continues running, the EEV is closed, and error code "A51"...
  • Page 40 VRF AHU Kit If the indoor and outdoor units communicate via HyperLink (M1M2): Cause 1: M1/M2 cable short- Properly connect the circuits or cuts off (1) cable Cause 2: The repeater UP and DOWN ports are not Properly connect the connected to the cable corresponding indoor unit (2)
  • Page 41 VRF AHU Kit Figure 1 Schematic diagram of HyperLink communication cable connection Upstream IDU and ODU of repeater 1# (including master ODU) Master ODU IDU 10# IDU 1# Repeater 1# Repeater 2# IDU 11# IDU 20# IDU 21# IDU 30# Downstream IDUs of repeater 1# Upstream IDUs...
  • Page 42 VRF AHU Kit 11.16 C51 - Abnormal communication between the IDU and wired controller Note: The error code C51 can be triggered either at the IDU side or the wired controller side. LED display Display position If a powered-on IDU does not receive any message from the wired controller: 1) Wired controller: "C51"...
  • Page 43 VRF AHU Kit Cause 1: The communication Replace the communication wire does not meet anti- wire that meets the anti- interference requirements interference requirements Cause 2: The communication is bonded and connected or Reconnect the signal cable the wire end metal oxidation according to the wiring exists, leading to the requirements...
  • Page 44 VRF AHU Kit 11.17 C61 - Abnormal communication between the IDU main control board and display control board Note: The error code C61 can be triggered either at the IDU side or at the panel or display box side. Digital display Display position After power on, normal communication was not established between the indoor unit and the wired...
  • Page 45 VRF AHU Kit Cause 1:Unplug the display box or panel Rec onne ct t he communication wire from c om m uni c$ t i on c $bl e or the main control board of r e- power t he I D U powered indoor unit.
  • Page 46 VRF AHU Kit 11.18 C71 - Abnormal communication between AHU Kit slave unit and master unit Note: When multiple AHU Kits are connected in parallel, the master AHU Kit (referred to as the master) communicates with the ODU, and the slave AHU Kit (referred to as the slave) communicates with the master AHU Kit. Digital display Display position (master) Error display...
  • Page 47 VRF AHU Kit 11.19 C72 - Number of AHU Kits is not the same as the set number Note: When multiple AHU Kits are connected in parallel, the master AHU Kit (referred to as the master) communicates with the ODU, and the slave AHU Kit (referred to as the slave) communicates with the master AHU Kit. Digital display Display position (master) Error display...
  • Page 48 VRF AHU Kit 11.20 C76 - Abnormal communication between the main wired controller and secondary wired controller Note: The error code C51 can be triggered either at the IDU side or at the wired controller side. Digital display Display position Error display The error code "C76"...
  • Page 49 VRF AHU Kit 11.21 C77, C78 - Abnormal communication between IDU main control board and 1# Expansion Board, abnormal communication between IDU main control board and 2# Expansion Board Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed.
  • Page 50 VRF AHU Kit 11.22 C79 - Abnormal communication between the IDU main control board and Switch module Digital display Display position Error display Panel, display box, and wired controller Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system: operate Error impact normally.
  • Page 51 VRF AHU Kit 11.23 d16 - Air inlet temperature of IDU is too low in heating mode Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 52 VRF AHU Kit 11.24 d17 - Air inlet temperature of IDU is too high in cooling mode Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally.
  • Page 53 VRF AHU Kit 11.25 E21, E24, E81 - T0 (fresh inlet air temperature sensor) short-circuits or cuts off, T1 (IDU return air temperature sensor) short-circuits or cuts off, and TA (outlet air temperature sensor) short-circuits or cuts Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops.
  • Page 54 VRF AHU Kit short-circuited or open-circuited. 4) Only the master unit needs to be connected to the T1/T0/TA sensors when the AHU kit is installed in parallel.
  • Page 55 VRF AHU Kit 11.26 EC1 - R32 refrigerant leakage sensor fault Check the R32 refrigerant leakage sensor of faulty IDU If the measured refrigerant saturation pressure at the liquid side or gas side is equal to the standard saturation pressure, there is no refrigerant leak.
  • Page 56 VRF AHU Kit module automatically resets when the sensor module communicates with the control board of the detection device. 2. The communication connection between the control board of the detection device and the adapter board A/B/D is shown in Figure 1. Figure 1 Schematic diagram of the R32 refrigerant leakage detection system...
  • Page 57 VRF AHU Kit 11.27 F01, F11 - T2A (heat exchanger liquid pipe temperature sensor) short-circuits or cuts off, T2 (heat exchanger middle temperature sensor) short-circuits or cuts off Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops.
  • Page 58 VRF AHU Kit 11.28 P71 - Main control board EEPROM fault Digital display Display position Error display Panel, display box, and wired controller The faulty IDU stops. Other IDUs of the same system: operate normally. Error impact ODU of the same system: operate normally. When the master chip cannot receive data from EEPROM (EEPROM: a non-volatile memory whose data Error trigger are kept even when powered off)
  • Page 59 VRF AHU Kit 11.29 P72 - IDU display control board EEPROM fault Digital display Display position Error display Panel or display box The faulty IDU operates normally, and the error code is displayed on the panel or display box only. Other IDUs of the same system: operate normally.
  • Page 60 VRF AHU Kit 11.30 U11 - Unit model code not set Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. 2) Other IDUs of the same system: If the address for the faulty IDU has been set, other IDUs will operate normally. If the address of the faulty IDU was not set, other IDUs will display error code "A51"-ODU fault.
  • Page 61 VRF AHU Kit 11.31 U12 – Capacity (HP) code not set Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. 2) Other IDUs of the same system: If the address for the faulty IDU has been set, other IDUs will operate normally. If the address of the faulty IDU was not set, other IDUs will display error code "A51"-ODU fault.
  • Page 62 VRF AHU Kit 11.32 U14 - The capacity value of the AHU Kit DIP switch does not match the model Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. Error impact 2) Other IDUs of the same system: operate normally ODU of the same system: operate normally The capacity value of the AHU Kit DIP switch is not within the capability segment corresponding to the current...
  • Page 63 VRF AHU Kit 11.33 U15 - The DIP value of AHU Kit's fan speed output voltage is incorrect Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. Error impact 2) Other IDUs of the same system: operate normally ODU of the same system: operate normally The voltage values corresponding to the high/medium/low speed of the AHU kit do not meet the condition：...
  • Page 64 VRF AHU Kit 11.34 U38 - Address code not detected Digital display Display position Error display Panel, display box, and wired controller 1) The faulty IDU stops running. 2) Other IDUs of the same system: The fan continues running, the EEV is closed, and ODU error code "A51" Error impact is displayed (V6 platform IDU displays the code "Ed").

  • Page 65: Accessories

    VRF AHU Kit 12 Accessories Name Shape Quantity Function Installation & Owner’s Manual Wired controller Wired controller Electronic Expansion valve extension cable Fixed clamp of temperature sensor Sleeve Temperature sensors Temperature sensors extension cables Screw ST 3.9x25 Secure the installation board Plastic expanded tube Cable Tie...

  • Page 66: Appendix

    VRF AHU Kit 13 Appendix 13.1 Temperature Sensor Resistance Characteristics Table 13.1: Indoor ambient temperature sensor, indoor heat exchanger mid-point temperature sensor and indoor heat exchanger outlet temperature sensor resistance characteristics Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance (°C) (kΩ) (°C) (kΩ)

This manual is also suitable for:

Ahukz-01fAhukz-02fAhukz-03fKahu-90.5Kahu-200.5Kahu-360.5 ... Show all

Table of Contents