Fault Codes / Bitzer / 4201

Bitzer 4201

Critical

ECOLINE — Motor Phase Loss

Bitzer 4201: Motor Phase Loss This fault typically halts operation and needs immediate attention.

Possible causes

Blown fuse or loose terminal connection on one phase
Faulty contactor contact or broken supply cable

Check steps

Measure voltage on all three phases at the terminal board and compare
Check fuses, contactor contacts, and cable connections

Affected parts

Hauptschütz/Main contactor
Sicherungen/Fuses
Netzzuleitung/Supply cable

Safety note

Warning high voltage! Disconnect and lock out main power before working on terminal board.

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?page=23), Alarm List: code 4201 "Motor Phase Loss" — part of Motor Alarms block 4201-4221 (4202 = Motor Phase Sequence, 4220/4221 = Motor frequency low/high). Fault=Yes, type=Timed, action=Restart.

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

Look up in Enthalio →

Related fault codes

Discharge Pressure High3411 Oil Pressure Low3502 Motor Phase Sequence Fault4202 Sensor Fault: Suction Pressure Sensor7401 Sensor Fault: Discharge Pressure Sensor7402 Sensor: Suction Pressure Signal High7404