Brand: SANYO
Category: Commercial Solutions
Document Type: Manual
Language: EN
Manual for SRR-23FD-MED
Uploaded: Nov. 21, 2025, 6:14 p.m.
Manual Publish Date: 2009-04-01
Cooling Cycle
LAMP: Lights up when the door is opened by the door switch. Also lights up via switch in glass door unit.
COMPRESSOR: Runs at set temperature value. Runs when set value is "o".
COND FAN MOTOR: Runs with compressor. Runs at set temperature value. Runs when set value is "o".
DOOR HEATER: Keeps running.
EVAPORATOR HEATER (Drain box heater): Keeps running. Controlled by thermal protector.
DEFROST HEATER: Running off.
DRAIN HEATER: Running off.
EVAP FAN MOTOR: Keeps running. Runs off when the door is opened.
Defrosting Cycle
LAMP: Lights up when the door is opened by the door switch. Also lights up via switch in glass door unit.
COMPRESSOR: Runs off during defrosting time. Runs for 3 minutes after defrosting.
COND FAN MOTOR: Runs off during defrosting time. Runs for 3 minutes after defrosting.
DOOR HEATER: Keeps running.
EVAPORATOR HEATER (Drain box heater): Keeps running. Controlled by thermal protector.
DEFROST HEATER: Runs off when EVAP. Coil temperature goes up to the set value "t".
DRAIN HEATER: Runs with defrosting, and for 3 minutes more after defrosting.
EVAP FAN MOTOR: Runs off during defrosting time. Runs for 1 minute after compressor restarts.
Troubleshooting and error codes
| Problem | Possible Cause | Solution |
|---|---|---|
| No cooling | #SH error message (EVAP. Coil temp or cabinet temp under -35 C) | OP: Sensor connection opened. SH: Sensor connection shorted. |
| Gas leak, Evap. Coil not cooled, Poor compressor compression, or Clogged capillary tube | Check and repair as necessary. | |
| Compressor not working | Check Compressor, Running Capacitor, or Starting Capacitor. If faulty, repair or replace. | |
| Condenser fan motor not working | Check Condenser fan motor. If faulty, repair or replace. | |
| Poor cooling | Air flow blocked by contents | Rearrange contents to allow proper air circulation. |
| Door opened repeatedly | Prevent frequent door openings. | |
| Leakage around door gasket | Repair or replace the door gasket. | |
| Excessive frost on Evap. Coil | Remove frost manually and adjust automatic defrosting period. | |
| Condenser coil & air filter clogged | Clean condenser coil and air filter. | |
| High ambient temperature (over 35 C) | Ensure proper ventilation for the condensing unit. | |
| Frost remaining on evaporator coil | The defrost function is maintained by values "t", "d", and "p" on the PCB. | |
| Frost on Evap. Coil | Manual defrost operation (Push SELECTION for 10 sec). | |
| Manual defrost operation displayed (flashing "d00") | If "d00" is flashing, check if defrosting is activated. | |
| Defrosting activated | If not activated, check Evap. Coil sensor, defrost heater, and controller. | |
| Any failure on Evap. Coil sensor | Check and replace if faulty. | |
| Any failure on defrost heater | Check and replace if faulty. | |
| Controller has no power to defrost heater terminal block | Replace the controller. |