PHNIX PC4001

PHNIX PC4001

PHNIX PC4001 is a main controller / scheda di controllo progettata per apparecchiature che includono pompe di calore aria-acqua, central air conditioners, industrial water chillers, and printing machines. It is a dedicated embedded main control board proprietary to PHNIX, commonly used in commercial heat pumps and industrial refrigeration units.

1. Informazioni di base

Marca: PHNIX

Modello: PC4001

Tipo: Main controller (control board) for heat pump / refrigeration units

Applicable Equipment:

PHNIX commercial air-to-water heat pumps (hot water / heating / ultra-low temperature Polaris series)

Industrial water chillers / refrigeration units

Printing machines, central air conditioners, pool heat pumps

Nature: Dedicated main control board with pre-programmed firmware, not a general-purpose PLC.

2. Funzioni principali (Heat Pump / Refrigeration Control)
3. Multi-mode Control

Heating / Cooling / Hot Water / Constant Temperature Dehumidification

2. Temperature Control

Closed-loop control of supply and return water temperature

Monitoring of ambient temperature, discharge temperature, and coil temperature

3. Funzioni di protezione

High pressure, low pressure, sovraccarico, perdita di fase, phase sequence, anti-freeze, high discharge temperature

Sensor fault, flow switch, and compressor protection

4. Compressor Management

Sequencing, time delay, and balanced start/stop for 1-3 compressori

5. External Device Control

Four-way valve, electronic expansion valve, fan, water pump, electric heater

6. Comunicazione & Display

Supports wired controller (Modello 95005 serie)

Some versions support Modbus-RTU

3. Typical Hardware Specifications

Alimentazione elettrica: AC 220V ±15% / 380V

Ingressi:

NTC 10KΩ temperature sensors (multiple)

High pressure switch, low pressure switch, flow switch, phase sequence protector

Outputs (Relè / Thyristor):

1-3 compressor outputs

Four-way valve, fan, water pump, electric heater, allarme

Display: Onboard LED run/fault indicators

Controller Interface: Dedicated 4/5-pin connector (for Model 95005, ecc.)

Dimensioni: Standard PCB board (ca. 150×120mm)

Montaggio: Screw-mounted inside the unit cabinet

4. Common Replacement / Modelli compatibili

PC4001: Basic universal version

430084: Common PHNIX heat pump mainboard (same-platform replacement)

20000-430084: Extended part number for ordering

PC4002 / PC4003: Upgraded versions (more compressors / protezione rafforzata)

5. Common Fault Codes

E1: High pressure protection

E2: Low pressure protection

E3: Supply water temperature sensor fault

E4: Return water temperature sensor fault

E5: Sovraccarico / sovracorrente

E6: Phase sequence error / perdita di fase

E7: Anti-freeze protection

E8: Excessively high discharge temperature

6. Difference from Carlo Gavazzi PC4001

Carlo Gavazzi PC4001: Phase sequence / phase loss protection relay (electrical protection)

PHNIX PC4001: Main control board for complete heat pump system (system control)

The two are completely different and not interchangeable.

7. Ordinare & Manutenzione

Original Ordering: Through PHNIX distributors (mostly using extended part number: 20000-430084)

Manutenzione: Requires original factory firmware; board replacement is generally the only solution.

PHNIX PC4001 Mainboard: Complete Installation & Commissioning Manual

The PC4001 is a dedicated main control board for PHNIX commercial heat pumps / water chillers (not a general-purpose relay). Below is the factory-level full procedure for installation, cablaggio, power-on, impostazione dei parametri, and troubleshooting (applicable to ultra-low temperature heat pumps, scaldabagni, chillers, and printing machine units).

1. Preparazione pre-installazione

1.1 Model Confirmation & Compatibilità

Mainboard: PC4001 / 20000-430084 (extended part number)

Applicazione: PHNIX 3-25HP commercial heat pumps / water chillers (single / dual compressor)

Wired controller: Matching Model 95005 wired controller (4/5-core cable)

Alimentazione elettrica: Three-phase AC 380V / Single-phase AC 220V (depending on unit)

1.2 Utensili & Accessori

Cacciavite a croce, spelafili, multimetro, tester di tensione

Crimp terminals, fascette per cavi, nastro isolante

NTC 10KΩ temperature sensors (supply water / return water / scarico / ambientale / bobina)

Phase sequence protector (PC4001 has built-in phase loss / phase sequence protection)

1.3 Precauzioni di sicurezza

Install with power disconnected: Turn off main power and attach lockout tag

Anti-static: Touch grounded metal to discharge static; do not operate with wet hands

Separate strong and weak current: Route power / compressor cables separately from signal wires

2. Mechanical Installation (Mainboard Mounting)
3. Mounting Location: Inside the unit’s electrical cabinet, away from compressors, tifosi, and high-temperature areas
4. Fixation: Secure the PCB with 4 Viti M3 (do not overtighten to avoid cracking the PCB)
5. Orientation: Mount vertically for heat dissipation; keep away from water accumulation / condensation
6. Liquidazione: Leave ≥3cm ventilation space around the board
7. Cablaggio standard (PC4001 Terminal Definitions)

3.1 Power Input (Three-phase 380V)

L1, L2, L3: Three-phase power input (correct phase sequence)

N: Neutral wire

PE: Protective earth (must be connected for shock and interference protection)

3.2 Compressor Outputs (1-2 unità)

COMP1: Compressor 1 (filo sotto tensione)

COMP2: Compressor 2 (filo sotto tensione)

COM: Common neutral

OVL: Protezione da sovraccarico (series-connected normally closed thermal relay)

3.3 External Device Control

FV: Four-way valve (heating / cooling switching)

FAN: Condensing fan

PUMP: Water pump / flow switch

EH: Electric heater (opzionale)

ALARM: Fault alarm output (dry contact)

3.4 Temperature Sensors (NTC 10KΩ)

T1: Supply water temperature (necessario)

T2: Return water temperature (necessario)

T3: Discharge temperature (necessario)

T4: Temperatura ambiente

T5: Coil temperature

3.5 Protection Switches (Normally Closed Inputs)

HP: High pressure switch (necessario)

LP: Low pressure switch (necessario)

FLOW: Flow switch (necessario)

PH: Phase sequence / perdita di fase (built-in, can be connected externally in series)

3.6 Wired Controller Interface

CN5 / CN6: 4-core cable (VCC, GND, DATA, CLK)

Cable length: ≤15 meters, shielded cable, kept away from high-voltage lines

3.7 Wiring Guidelines

All terminals use crimp terminals + tinning to prevent loosening

Route strong and weak current in separate ducts; shield of signal cables grounded at one end

Compressor wires ≥2.5mm², signal wires 0.75mm²

Secure wiring with cable ties to avoid abrasion by fans or compressors

4. Pre-power Inspection (Critical)
5. Multimeter Checks:

L1-L2-L3: Balanced three-phase voltage (380V±5%)

Insulation: Compressor / fan insulation to ground ≥ 2MΩ

2. Phase Sequence Check:

Use phase sequence meter to confirm L1-L2-L3 is positive phase sequence

Incorrect phase sequence triggers E6 on PC4001

3. Sensor Check:

All NTC sensors measure approx. 10KΩ at room temperature

No short circuit or open circuit in sensor cables

4. Protection Switches:

High pressure / low pressure / flow switches are normally closed and conducting

No bypassed protections (do NOT short HP / LP / FLOW)

5. Power-on Commissioning (Wired Controller Operation)

5.1 First Power-on

Turn on main power → Mainboard LED lights up, wired controller shows boot screen

Self-test: 30 secondi, checking sensors, inputs/outputs, and protections

5.2 Unit Parameter Setting (Required)

To enter parameters: Long press [SET] on wired controller for 5 seconds → Password [6666]

P00: Unit type selection

0: Heat pump water heater

1: Heat & cool heat pump

2: Industrial water chiller

P01: Number of compressors (1/2)

P02: Rated supply water temperature (hot water 55℃ / chiller 7℃)

P03: Temperature differential (2-3℃)

P04: Anti-freeze temperature (5℃)

P05: High discharge temperature protection (110-120℃)

P06: Fan control (0: constant run / 1: thermostatic control)

P07: Water pump control (0: unit interlock / 1: constant run)

5.3 Calibration & Test

1. Temperature Calibration:

Compare multimeter readings with controller display → Calibrate in P20-P24

2. Manual Test (Service Mode):

Long press [MODE + OK] for 5 seconds → Manual output mode

Test sequentially: COMP1, COMP2, FV, FAN, PUMP, ALARM

Verify normal pull-in, no short circuit, no abnormal odor

5.4 Phase Sequence & Protection Test

Disconnect any phase → Immediate E6 (perdita di fase)

Reverse phase sequence → E6 (phase sequence error)

Open high pressure switch → E1 (high pressure)

Disconnect supply water sensor → E3 (sensor fault)

6. Operational Commissioning
7. Mode Selection: Hot Water / Cooling / Heating
8. Temperature Setting:

Hot water: 50-55℃

Chilled water: 7-12℃

Heating: 45-55℃

3. Monitoring:

Compressor starts after 3-minute delay (prevents frequent cycling)

Discharge temperature 60-90℃ (≤110℃)

Pressure levels:

Cooling: High pressure 12-18bar, low pressure 3-5bar

Heating: High pressure 18-25bar, low pressure 1.5-3bar

4. Protection Operation:

Over-temperature / over-pressure → immediate shutdown with corresponding fault code

Fault lockout: Reset by power cycle or controller [Reset]

7. Common Fault Codes & Soluzioni

E1: High pressure protection → Check dirty condenser, fan, high pressure switch

E2: Low pressure protection → Check insufficient refrigerant, perdita, low pressure switch

E3: Supply water sensor fault → Check T1 wiring, damaged sensor

E4: Return water sensor fault → Check T2

E5: Sovraccarico / overcurrent → Check compressor, thermal relay, voltaggio

E6: Phase sequence / phase loss → Correct phase sequence, check three-phase input

E7: Anti-freeze protection → Check water temperature, pump, anti-freeze settings

E8: High discharge temperature → Check refrigerant, heat dissipation, discharge sensor

8. Key Difference from Carlo Gavazzi PC4001

PHNIX PC4001: Complete heat pump main control board (controllare + protezione)

Carlo Gavazzi PC4001: Phase sequence relay (only phase loss / phase sequence protection)

Not interchangeable

9. Delivery List

PC4001 mainboard

Manuale / parameter sheet

Wired controller (95005)

Sensors (T1/T2/T3)

Terminal kit

PHNIX PC4001 Complete Parameter Setting Manual (Using 95005 Controller)

The PC4001 is matched with the Model 95005 wired controller; all parameters are set via the controller.

Core steps: Long press SET 5s → Password 6666 → Select P parameter → Modify → Save

1. Entering Parameter Settings (Essential Steps)

1.1 Enter Menu

Controller on normal standby screen

Long press [SET] key for 5 secondi

Display shows P00, enter password: 6666

Press [OK] to enter parameter list

1.2 Button Functions

[SET]: Confirm, enter, up / +

[C/F]: Down / -, interruttore

[MODE]: Exit, back

[OK]: Save, lock

1.3 Parameter Editing Flow

1. Press [SET / C/F] to select parameter (P00-P30)
2. Press [SET + C/F] together → value flashes
3. Press [SET / C/F] to adjust value
4. Press [SET + C/F] together again → save (stops flashing)
5. Long press [MODE] for 3 seconds → exit menu
6. Core Basic Parameters (P00-P09, Required)

P00 Unit Type (Most Important)

0: Heat pump water heater (predefinito)

1: Heat & cool heat pump

2: Industrial water chiller

P01 Number of Compressors

1: 1 compressor

2: 2 compressori

P02 Rated Set Temperature

Hot water: 50-55℃

Heating: 45-55℃

Chilled water: 7-12℃

P03 Temperature Differential (On/Off Offset)

Raccomandato: 2-3℃

Esempio: Set 55℃, stop at 57℃, start at 54℃

P04 Anti-freeze Temperature

Default: 5℃

Water temp <5℃ → auto start pump / low-temp heating

P05 High Discharge Temperature Protection

Default: 110℃

Raccomandato: 105-115℃ (immediate shutdown if exceeded)

P06 Fan Control Mode

0: Constant run (always on in cooling / heating)

1: Thermostatic control (stops at set temp, restarts low)

P07 Pump Control Mode

0: Unit interlock (pump runs when compressor runs)

1: Constant run (runs continuously when powered)

P08 Compressor Time Delay Protection

Default: 3 minuti

Range: 0-5 minuti (prevents frequent starting)

P09 Current Protection (Sovraccarico)

Set to compressor rated current × 1.1-1.2

Overcurrent → E5 overload protection

3. Temperature Calibration Parameters (P20-P24)

P20 Supply Water Temp (T1) Calibration

Actual temperature – Displayed temperature = Calibration value

Esempio: Actual 50℃, display 52℃ → set -2

P21 Return Water Temp (T2) Calibration

P22 Discharge Temp (T3) Calibration

P23 Ambient Temp (T4) Calibration

P24 Coil Temp (T5) Calibration

Range: -10～+10℃

Must save and exit after calibration

4. Protezione & Advanced Parameters (P25-P30)

P25 High Pressure Protection Value

Cooling: 20-22 bar

Heating: 25-28 bar

P26 Low Pressure Protection Value

Cooling: 1.5-2 bar

Heating: 1.0-1.5 bar

P27 Defrost Temperature / Time

Defrost start: -3～-5℃

Max defrost duration: 10 minuti

P28 Electric Heating Enable Temperature

Esempio: ≤40℃ allows electric heater activation

P29 Modbus Address (Opzionale)

Default: 1

Set to 1, 2, 3… for multi-unit networking

P30 Restore Factory Defaults

0: Do not restore

1: Restore defaults (use with caution)

5. Manual Test Mode (For Service)

Enter Manual Test

Normal screen → Long press [MODE + OK] for 5 secondi

Display shows TEST

Manual Output Test

Press [SET / C/F] to select output:

1. COMP1: Compressor 1
2. COMP2: Compressor 2
3. FV: Four-way valve
4. FAN: Fan
5. PUMP: Water pump
6. ALARM: Alarm

Press [OK] to switch on/off

Long press [MODE] to exit test

6. Difetti comuni & Parameter Adjustments

E1 High Pressure: Increase P25 by 1-2 bar or clean condenser

E2 Low Pressure: Decrease P26 by 0.5 bar or recharge refrigerant

E3/E4 Sensor Fault: Calibrate P20/P21 or replace NTC 10K

E6 Phase Sequence: Swap any two of L1/L2/L3

Frequent Cycling: Increase P03 differential to 3-5℃

E8 High Discharge Temp: Set P05 to 110℃ or check cooling

7. Quick Parameter Setting Table (Direct Input)

8. Note

Parameters must be saved after editing (value stops flashing)

Do NOT short protection terminals (HP/LP/FLOW)

Use precision multimeter for temperature calibration

Lock parameters after commissioning: Change password to 8888 to prevent accidental changes