Patient lifts · BHM family

Arjo BHM V4: troubleshooting and error codes

The ServiceForge knowledge base holds 13 documented symptoms for the Arjo BHM V4, with 17 ranked causes, 13 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Hand control buttons do not respond

Pressing buttons on hand control has no effect on ceiling lift operation

Ranked causes

1. Ceiling lift in charging proximity (common)
2. Emergency stop activated (occasional)
3. Hand control connector loose or partially inserted (occasional)
4. Ceiling lift cassette buttons or internal circuit faulty (occasional)

First check

Verify charger light status

Test point: Yellow charger indicator on cassette
Expected: Charger light off when away from station

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Batteries depleted after few transfers

Battery charge dies after only 3-5 patient transfers despite recent charging

Ranked causes

1. Charger or charging station contacts faulty (occasional)
2. Batteries near end of service life (common)

First check

Test charger operation

Test point: Charging station with cassette
Expected: Yellow indicator lights and cassette holds charge for multiple transfers

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Audible beep during operation with intermittent stopping

Ceiling lift emits beep sound; unit may stop lifting but lowering still functions

Ranked causes

1. Battery charge low (common)

First check

Place cassette on charging station

Test point: Ceiling lift cassette on charging clip
Expected: Yellow charger indicator lights up

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Cassette misaligned or travels wrong direction on return to charger

Ceiling lift cassette passes clip on charging station or moves in incorrect direction during automated return

Ranked causes

1. Dirty contact blades on charging station (common)

First check

Inspect charging station contacts

Test point: Contact blades on clip-on charging station
Expected: Contacts clean and free of debris

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Ceiling lift overshoots charger on return

When pressing the button to return ceiling lift to its charger (4-way motor only), the unit travels past the charger instead of stopping at it.

Ranked causes

1. Charging station has no power or defective contacts (common)

First check

Verify charging station has power and functional contacts

Test point: charging station
Expected: Charger operational with valid voltage signal

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Charger indicator does not light on charging station

Yellow indicator light on ceiling lift cassette does not illuminate when placed on charger

Ranked causes

1. Charger not plugged in or outlet dead (common)

First check

Verify charger outlet has power

Test point: Power outlet where charger is connected
Expected: Outlet powers other devices; green light illuminates on charging station

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Charging light continues flashing yellow after overnight recharge

Yellow charging indicator on ceiling lift cassette remains flashing and does not turn solid after overnight recharging.

Ranked causes

1. Charging station has no power or defective contacts (common)

First check

Measure voltage on charging station contact points

Test point: charging station contact points
Expected: between 26 and 30 volts VDC, 26-30 V
Tools: voltmeter

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Lift will not operate after full diagnostics patient safety

Ceiling lift does not function after all troubleshooting steps attempted

Ranked causes

1. Unit requires professional service (unknown)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Red light solid

Red indicator light remains continuously lit on ceiling lift cassette

Ranked causes

1. Overheat protection activated (common)

First check

Verify red light turns off

Test point: Red indicator on ceiling lift cassette
Expected: Light turns off after 10-30 minutes

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Red service light flashing

Red service light blinks on the ceiling lift cassette

Ranked causes

1. Unit requires scheduled maintenance (unknown)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Solid yellow light but limited lift capacity

Yellow indicator light steady on unit; cassette only completes one or two transfers before stopping

Ranked causes

1. Batteries require replacement (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Solid yellow light with no-load operation but failure under load patient safety

Yellow indicator continuously lit; ceiling lift operates when unloaded but stops when patient is transferred

Ranked causes

1. Batteries insufficient capacity (common)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit starts and stops repetitively patient safety

Ceiling lift begins operation then stops repeatedly without completing motion

Ranked causes

1. Load exceeds safe working load limit (common)

First check

Verify total load is within specification

Test point: Patient and equipment total weight
Expected: Load within safe working load limit

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.