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Bosch ERV Service Instructions Manual
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Bosch ERV Service Instructions Manual

Energy recovery ventilation unit
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Service instructions
Energy Recovery Ventilation Unit
ERV
ERV 300-2 | ERV 400-2 | ERV 500-2 | ERV 800-2 | ERV 1000-2

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Summary of Contents for Bosch ERV

  • Page 1 Service instructions Energy Recovery Ventilation Unit ERV 300-2 | ERV 400-2 | ERV 500-2 | ERV 800-2 | ERV 1000-2...
  • Page 2 Main PCB ports........4 Main PCB ports for ERV 300-2..1000-2 m3/h ..4 Fan module ports for ERV 300-2..1000-2 m3/h .
  • Page 3 ▶ Improper installation or connection of equipment and accessories may cause electric shocks, short circuits, leaks, fires, or other damage to the equipment. Use only accessories, equipment and spare parts made or approved by the manufacturer. ERV – 6721888371 (2024/04)
  • Page 4 Main PCB ports Main PCB ports Main PCB ports for ERV 300-2..1000-2 m 0010054770-001 Fig. 1 Main PCB ports Arrangement of components may differ from the picture for each model. ERV – 6721888371 (2024/04)
  • Page 5 Reserved: this port cannot be used. Code Content Description CN55 Remote on/off switch connection 1 pin CN18 Communication switch board GND2(1 pin) Pressure differential switch 1 pin CN30 sensor 5V(4 pin) CN99 After-sale kit communication port Table 1 Voltage test instructions ERV – 6721888371 (2024/04)
  • Page 6 Main PCB ports Fan module ports for ERV 300-2..1000-2 m Arrangement of components may differ from the picture for each model. 0010054778-001 Fig. 2 Fan module ports Pos. Port code Description Port voltage CN1 (L, N) AC power input 220 V AC Standard;...
  • Page 7 Start and stop control The ERV offers three adjustable wind speeds and features temperature The ERV unit allows mode and fan switch adjustment based on air quality sensors T1 (inlet air temperature sensor) and T4 (outlet air temperature or outdoor air intake temperature. It also supports integration with the sensor).
  • Page 8 Forced low wind Switch fan speed based restriction restriction speed on the difference of tT4 (outlet air temperature) Stop fan Stop fan Stop fan or gas concentration Fault Stop fan Stop fan Stop fan Table 5 ERV – 6721888371 (2024/04)
  • Page 9 For consistent and dependable ERV operation, the system incorporates logic to restrict fan operation within predefined parameters. Anti-cold air restriction 0010054780-001 When the intake air temperature is excessively low, the ERV will activate Fig. 5 the anti-cold air logic to prevent an increase in room cooling load. PM2.5(ug/m) T4 (ºC)
  • Page 10 Air quality sensor Port on the main control board of the indoor unit For ERV models equipped with an air quality sensor, following a 1-hour The CN55 port connects the passive switch signal. shut-down, the ERV initiates a mandatory 6-minute Speed 1 operation.
  • Page 11 High bus voltage fault Phase current sample bias error Motor and indoor unit are unmatched IPM and indoor unit are unmatched Motor start-up failure Motor blocking protection Speed control mode setting error Phase lack protection of motor Table 8 ERV – 6721888371 (2024/04)
  • Page 12 • Emergency shut down. Find out the cause of the emergency shut down and solve it before clearing the emergency shut down signal Is the fault cleared Replace the main control board of the indoor unit ERV – 6721888371 (2024/04)
  • Page 13 X+1, X+2, X+3, X+4, kW>112 Minimum address Minimum address code can be any code X integer from 0 to 56, denoted by X, and the adjacent address is: X+1, X+2, X+3, X+4, X+5, X+6, X+7 Table 10 ERV – 6721888371 (2024/04)
  • Page 14 If one indoor unit is 15 kW and the address code is set to 5, then this indoor unit 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. ERV – 6721888371 (2024/04)
  • Page 15 1) Communication cables are only provided for units whose fan drive board is independent of the indoor unit's main control board. 2) For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 16 Replace the communication cable and properly circuited? connect the cable Is the fault cleared after replacing the wired controller? The wired controller is damaged. Change the wired controller Replace the main control board of the indoor unit ERV – 6721888371 (2024/04)
  • Page 17 The function expansion board is damaged Replace the function expansion board The main control board of the indoor unit cannot be directly connected to the function expansion board. Instead, an adapter board has to be used. ERV – 6721888371 (2024/04)
  • Page 18 Fig. 11 Wiring diagram of function expansion board, adapter board, and indoor unit's main control board Two-core communication cable (configured on site) Function expansion board Adapter board Indoor unit’s main control board Ten-core communication cable (configured by factory) ERV – 6721888371 (2024/04)
  • Page 19 The indoor unit's main control board is damaged Replace the main control board of the indoor unit The adapter board is damaged Replace the adapter board ERV – 6721888371 (2024/04)
  • Page 20 • It is recommended to wear an antistatic wrist strap on the wrist. • Ensure that the metal piece inside the antistatic wrist strap makes close contact with the skin. • Place the metal clamp of the antistatic wrist strap on the exposed copper grounding wire. ERV – 6721888371 (2024/04)
  • Page 21 If the error cannot be cleared after the procedure Replace the PM2.5 sensor above, the PM2.5 sensor is damaged 1) If the PM2.5 sensor is integrated with the sensor control board, making disassembly difficult, then replace the sensor control board directly. ERV – 6721888371 (2024/04)
  • Page 22 1) Measure the resistance between two pins of the sensor plug with a multimeter. A resistance value close to 0 indicates a short circuit has occurred in the temperature sensor, and a resistance value close to infinity indicates an open circuit in the temperature sensor. ERV – 6721888371 (2024/04)
  • Page 23 The outdoor unit of the same system operates normally. Procedure 0010054739-001 Description Use a multimeter to check whether the power supply Rectify the power supply voltage of the indoor unit is lower than 165V Replace the fan drive board or the main control board ERV – 6721888371 (2024/04)
  • Page 24 The outdoor unit of the same system operates normally. 0010054787-001 Procedure Description Reconnect the power lines based on the wiring diagram. Is the fault cleared? Replace the main control board of the indoor unit ERV – 6721888371 (2024/04)
  • Page 25 The faulty indoor unit stops. The other indoor units of the same system 0010049915-001 operate normally. The outdoor unit of the same system operates normally. Procedure Power off and then power on the indoor unit Is the fault cleared? Replace the main control board of the indoor unit ERV – 6721888371 (2024/04)
  • Page 26 Is the fault cleared? Replace the main control board of the indoor unit For specialized tooling and instructions, contact your local dealer or technical support personnel. ERV – 6721888371 (2024/04)
  • Page 27 Is the fault cleared? Replace the main control board of the indoor unit For specialized tooling and instructions, please contact your local dealer or technical support personnel. ERV – 6721888371 (2024/04)
  • Page 28 High bus voltage fault Phase current sample bias error IPM (fan module) and indoor unit unmatched Motor start-up failure Motor blocking protection Speed control mode setting error Phase lack protection of motor Table 11 Fan drive fault code ERV – 6721888371 (2024/04)
  • Page 29 For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 30 For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 31 PCB type 1 PCB type 2 P/N measuring point P/N measuring point P/N measuring point (front of the PCB) (back of the PCB) 0010049939-001 0010049940-001 0010049938-001 Table 12 ERV – 6721888371 (2024/04)
  • Page 32 PCB type 1 PCB type 2 P/N measuring point P/N measuring point P/N measuring point (front of the PCB) (back of the PCB) 0010049939-001 0010049940-001 0010049938-001 Table 13 ERV – 6721888371 (2024/04)
  • Page 33 Replace the main control board of the indoor unit For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 34 For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 35 For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 36 For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 37 For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 38 Is the fault cleared? Replace the main control of the indoor unit For specialized tooling and instructions, contact your local dealer or technical support personnel. ERV – 6721888371 (2024/04)
  • Page 39 For units whose fan drive board is welded onto the main control board, if either the fan drive board or main control board becomes faulty, the whole control board has to be replaced. ERV – 6721888371 (2024/04)
  • Page 40 2.553 2.737 2.931 24.938 26.471 28.074 2.456 2.635 2.825 23.725 25.145 26.626 2.362 2.538 2.723 22.578 23.892 25.260 2.273 2.444 2.626 21.492 22.708 23.972 2.187 2.355 2.533 20.464 21.590 22.757 2.105 2.269 2.444 19.491 20.532 21.609 ERV – 6721888371 (2024/04)
  • Page 41 0.490 0.551 0.619 0.475 0.535 0.602 0.461 0.520 0.585 0.448 0.505 0.569 0.434 0.490 0.553 0.422 0.477 0.538 0.410 0.463 0.523 0.398 0.450 0.509 0.386 0.438 0.495 0.375 0.425 0.482 0.365 0.414 0.469 0.354 0.402 0.456 ERV – 6721888371 (2024/04)
  • Page 42 1640.6 237.95 215.32 31.23 1686.8 244.65 228.09 33.081 1734 251.49 241.25 34.99 1782.1 258.47 254.81 36.957 1831.1 265.58 268.78 38.983 1881.1 272.83 283.17 41.07 1932.1 280.23 297.98 43.218 1984 287.76 313.23 45.43 2037 295.44 328.91 47.705 ERV – 6721888371 (2024/04)
  • Page 43 493.39 71.561 -47.131 -6.8358 514.04 74.555 -43.935 -6.3722 535.22 77.627 -40.589 -5.8869 556.95 80.779 -37.087 -5.379 579.24 84.012 -33.425 -4.8479 602.1 87.327 -29.597 -4.2927 625.53 90.725 -25.599 -3.7128 648.55 94.209 -21.423 -3.1072 674.16 97.779 -17.066 -2.4752 ERV – 6721888371 (2024/04)
  • Page 44 2097.5 304.22 2152.6 312.21 2208.8 320.36 2266 328.66 2324.3 337.11 2383.7 345.73 244.2 354.5 2505.8 363.44 2568.5 372.54 2632.4 381.8 2697.5 391.24 2763.7 400.85 2831.2 410.63 2899.8 420.59 2969.7 430.73 3040.9 441.05 3113.3 451.55 3187.1 462.25 ERV – 6721888371 (2024/04)
  • Page 45 1680.6 243.75 220.24 31.943 1728.2 250.65 233.24 33.828 1776.7 257.69 246.64 35.772 1826.2 264.87 260.45 37.775 1876.6 272.18 274.68 39.838 1928.1 279.65 289.33 41.964 1980.5 287.25 304.43 44.153 2034 295.01 319.97 46.407 2088.5 302.91 335.96 48.727 ERV – 6721888371 (2024/04)
  • Page 46 507.39 3579.6 519.17 3662.2 531.16 3746.3 543.36 3831.9 555.77 3919 568.4 4007.6 581.25 4097.8 594.33 4189.6 607.64 4282.9 621.19 4378 634.97 4474.7 4573.2 663.29 4673.4 677.82 4775.5 692.63 Table 17 Saturated vapour state of refrigerant R32 ERV – 6721888371 (2024/04)
  • Page 48 Bosch Thermotechnik GmbH Sophienstrasse 30-32 35576 Wetzlar, Germany www.bosch-industrial.com...

This manual is also suitable for:

Erv 300-2Erv 400-2Erv 500-2Erv 800-2Erv 1000-2