YRC1000 Regular Inspection Checklist
Skipping routine checks shortens controller life and can lead to unexpected stops. The list below summarises what to check on the YRC1000 cabinet and how often.
Inspection schedule
| Item | What to check | Frequency |
|---|---|---|
| Cabinet doors | Fully closed and locked | Daily |
| Door seals | No gaps or damage | Monthly |
| Rear duct fan | Running (servo ON) | Monthly |
| Emergency stop buttons | Servo turns off when pressed | Daily |
| Enable switch | Works correctly in TEACH mode | Each use |
| Memory battery | No "Memory battery weak" message | When an alarm appears |
| Supply voltage | Within specification | Before use |
| Breaker lead cables | Not loose, broken or falling out | Before use |
| Controller cables | Not twisted or disconnected | Daily |
| Heat exchanger fan | Running | Monthly |
| Air filter | Not clogged or dusty | As required, at least monthly |
Notes on key items
Sealed cabinet. The YRC1000 is sealed to keep out oil mist, so keep the doors closed even when the controller is idle. Turn off the main power before opening, and check that the inside is clean – heavy staining means the seal is leaking.
Fans and filter. The heat-exchanger fans run whenever power is on; the rear duct fan runs while the servo is on. Confirm air flow at the intakes and outlets. Clean a dirty filter with an air blower; if that is not enough, wash it in lukewarm water (about 40 °C), dry it completely, or replace it. A message about the power-supply unit's cooling fan stopping means that fan should be inspected and replaced soon.
Enable switch test. In TEACH mode press SERVO ON READY (the lamp blinks). A light grip should turn servo power on; gripping hard or releasing should turn it off. If the lamp never lights, check for a pressed E-stop, an external E-stop input or an active major alarm.
Supply voltage. Measure the line voltage at the main breaker terminals with a tester. Acceptable values are the rated range +10 % / −15 % (200–240 V, 380–440 V or 380–480 V depending on model). On 200 V units with phase-S grounding, the S phase to earth should read about 0 V.
The cabinet contains 200–480 VAC even with the door open for fan checks. Never touch internal units while power is on.
Source: Based on YASKAWA manual RE-CHO-A114.