Fault Codes / Bitzer / 4220

Bitzer 4220

High

ECOLINE / Frequenzumrichterbetrieb — Motor Frequency Low (VFD operation)

Bitzer 4220: Motor Frequency Low (VFD operation) This fault noticeably affects operation.

Possible causes

VFD configured below the compressor's allowable frequency range (see SG-0012 sec. 2.7)
Incorrect VFD parameterization or signal fault

Check steps

Verify minimum frequency per BITZER specs (CE1-CE3: 30Hz, CE4/BE5: 25Hz, BE6: 30Hz)
Confirm VFD parameters with BITZER application engineering

Affected parts

Frequenzumrichter/VFD
Motor

Safety note

Disconnect main power before working on the VFD; capacitors may retain charge.

Source: Bitzer resmi servis kilavuzu (bagimsiz cift-dogrulandi) — BITZER CM-SW-01 Reference Manual (ManualsLib, https://www.manualslib.com/manual/1798597/Bitzer-Cm-Sw-01.html, alarm list page ~23), category "42-* Motor - Supply": code 4220 "Motor frequency low", Warning=No, Critical=No, Fault=Yes, Reset type=Restart. Neighboring codes in same table: 4201 Motor Phase Loss, 4202 Mo…

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