Checking code |
| Meaning, detecting method |
| Cause | Checking method & Countermeasure | |||
|
|
|
|
|
| |||
4116 | Fan speed | (Detects only for | 1) | Slipping off of fan speed detect- | • | Confirm slipping off of connector | ||
| abnormality | 1. Detecting fan speed below |
| ing connector (CN33) of indoor |
| (CN33) on indoor controller | ||
| (motor |
| 180rpm or over 2000rpm dur- |
| controller board. |
| board. | |
| abnoramlity) |
| ing fan operation at indoor unit |
|
|
|
| |
|
|
| (first detection) enters into the | 2) | Slipping off of fan output connec- | • | Confirm slipping off of connector | |
|
|
|
| tor (FAN1) of indoor power board. |
| (FAN1) on indoor power board. | ||
|
|
| mode to stop fan for 30 sec- |
|
|
|
| |
|
|
| onds. |
| 3) | Disconnection of fan speed | • | Check wiring for disconnection. |
|
| 2. | When detecting fan speed be- |
| detecting connector (CN33) of |
|
| |
|
|
| low 180rpm or over 2000rpm |
| indoor controller board, or that of |
|
| |
|
|
| again at fan returning after 30 |
| fan output connector (FAN1) of |
|
| |
|
|
| seconsd from fan stopping, er- |
| indoor power board. |
|
| |
|
|
| ror stop (fan also stops) will be |
|
|
|
| |
|
|
| commenced displaying 4116. | 4) | Filter cologging. | • | Check filter. | |
|
|
|
|
| 5) Trouble of indoor fan motor. | • | Check indoor fan motor. | |
|
|
|
|
| 6) Faulty fan speed detecting circuit | • | When aboves have no trouble. | |
|
|
|
|
|
| of indoor controller board, or | 1) | For trouble after operating fan. |
|
|
|
|
|
| faulty fan output circuit of indoor |
| Replace indoor controller board. If |
|
|
|
|
|
| power board. |
| not remedied, replace indoor |
|
|
|
|
|
|
|
| power board. |
|
|
|
|
|
|
| 2) | For trouble without operating fan. |
|
|
|
|
|
|
|
| Replace indoor power board. |
|
|
|
|
|
|
|
|
|
4200 | VDC | 1 | If VDC | 304 V is detected just | 1) | Power supply voltage is abnor- | • | Check if an instantaneous power |
| sensor/circuit |
| before the inverter starts. |
| mal. |
| failure or power failure, etc. has | |
| abnormality | 2 | If VDC | 750 V is detected just |
|
|
| occurred. |
|
|
| before starting of and during |
|
| • | Check if the voltage is the rated | |
|
|
| operation of the inverter. |
|
|
| voltage value. | |
|
|
|
|
| 2) The wiring is defective. | Check 1, the connections, 2, contact | ||
|
|
|
|
|
|
| at the connectors, 3 tightening torque | |
|
|
|
|
|
|
| at screw tightened portions, 4, wiring | |
|
|
|
|
|
|
| polarities, 5, for broken wires, and 6, | |
|
|
|
|
|
|
| for grounding in the following wiring. | |
|
|
|
|
|
|
|
| TB1A~NF~TB1B, TB1B~DS~[52C, |
|
|
|
|
|
|
|
| R1, R5]~[C2, C3]~IPM Wiring |
|
|
|
|
|
|
|
| CNDC1 (G / A) ~ CNVDC (INV) Wir- |
|
|
|
|
|
|
|
| ing |
|
|
|
|
|
|
| * | Check if the wiring polarities are as |
|
|
|
|
|
|
|
| shown on the wiring diagram plate. |
|
|
|
|
| 3) The rush current prevention | To judge failure of R1 and R5, go to | ||
|
|
|
|
|
| resistors (R1, 5) are defective. | “Individual Parts Failure Judgment | |
|
|
|
|
|
|
| Methods.” | |
|
|
|
|
| 4) | The electromagnetic contactor | To judge failure of the 52C, go to | |
|
|
|
|
|
| (52C) is defective. | “Individual Parts Failure Judgment | |
|
|
|
|
|
|
| Methods.” | |
|
|
|
|
| 5) | The diode stack (DS) is defective. | To judge failure of the DS, go to | |
|
|
|
|
|
|
| “Individual Parts Failure Judgment | |
|
|
|
|
|
|
| Methods.” | |
|
|
|
|
| 6) | The reactor (DCL) is defective. | To judge failure of the DCL, go to | |
|
|
|
|
|
|
| “Individual Parts Failure Judgment | |
|
|
|
|
|
|
| Methods.” | |
|
|
|
|
| 7) | The INV board is defective. | If none of the items in 1) to 6) is | |
|
|
|
|
|
|
| applicable, and if the trouble | |
|
|
|
|
|
|
| reappears even after the power is | |
|
|
|
|
|
|
| switched on again, replace the INV | |
|
|
|
|
|
|
| board (when replacing the circuit | |
|
|
|
|
|
|
| board, be sure to connect all the | |
|
|
|
|
|
|
| connectors, ground wires, etc. | |
|
|
|
|
|
|
| securely). | |
|
|
|
|
|
|
|
|
|
