LogrobotLM

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FANUC Alarm SRVO-148 — SERVO HCAL(CNV) alarm (G:%d A:%d)

FANUC SRVO-148 (“SERVO HCAL(CNV) alarm (G:%d A:%d)”): The current in the main power circuit of the servo amplifier exceeded specification. First check: Disconnect the motor power wires from the servo amplifier and turn on power. Likely part: Servo amplifier (Servo amplifier).

Updated 2026-08-29 · LogrobotLM reference

Description

The current in the main power circuit of the servo amplifier exceeded specification.

Remedy · Remède

Disconnect the motor power wires from the servo amplifier and turn on power. If an HCAL occurs, replace the transistor module or servo amplifier. Measure the resistance between GND and U, V, W individually on the cable terminals. If shorted, determine if the cable or motor is bad. Check the resistance between U-V, V-W, and W-U using a measuring instrument sensitive enough to detect small resistances at the cable terminations. If the resistances are the same, replace the servo amplifier. If the resistances are different, determine if the cable or motor is bad. If the problem persists, replace the SIF module on the axis control for the defective axis.

Part to check / replace · Pièce à contrôler / remplacer

FANUC SRVO-148 points to the hardware below — start here before ordering. · SRVO-148 met en cause l'organe ci-dessous : commencez par là.

Tap a part for every code that points to it — and verify the exact variant for your controller before ordering. · Touchez une pièce pour tous les codes qui la citent ; vérifiez la variante exacte avant commande.

Frequently asked · Questions fréquentes

What does FANUC alarm SRVO-148 mean?
FANUC SRVO-148 (“SERVO HCAL(CNV) alarm (G:%d A:%d)”): The current in the main power circuit of the servo amplifier exceeded specification.
How do you troubleshoot FANUC alarm SRVO-148?
Disconnect the motor power wires from the servo amplifier and turn on power. If an HCAL occurs, replace the transistor module or servo amplifier. Measure the resistance between GND and U, V, W individually on the cable terminals. If shorted, determine if the cable or motor is bad. Check the resistance between U-V,…
Which part is involved in FANUC SRVO-148?
SRVO-148 points to Servo amplifier (Servo amplifier). Confirm the real cause against the robot backup before replacing a part.

Related codes / Codes liés

SRVO-146SERVO LVAL(INV-DC) alarm(G:%d A:%d)SRVO-147SERVO LVAL(DCLK) alarm (G:%d A:%d)SRVO-149SERVO HCAL(INV) alarm (G:%d A:%d)SRVO-150SERVO FSAL(CNV) alarm (G:%d A:%d)

Same hardware involved / Même matériel en cause

SRVO-018Servo amplifierSRVO-021Servo amplifierSRVO-022Servo amplifierSRVO-023Servo amplifier

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →