ERROR CODES AND ALARM STATUS
UNIT CONTROL PANEL
THE DISPLAY SHOWN BELOW HAS FOUR DIGITS. THE LEFT TWO DIGITS INDICATE THE ERROR CODE ( 1 TO 24 ), THE ON/OFF ICONS ABOVE THESE TWO DIGITS INDICATE THE CURRENTS STATE OF THE ERROR CODE. THE RIGHT TWO DIGITS SHOW THE HISTORY COUNT (UP TO 99) OF THE ASSOCIATED ERROR CODE. THE DISPLAY CONTAINS A MAINTENANCE ICON (WRENCH) THAT WILL ILLUMINATE TO INDICATE WHEN THE UNIT NEEDS MAINTE- NANCE.
Check Error Codes
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| 1. PRESS THE ENTER KEY TO ACTIVATE THE DISPLAY. |
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| 2. EACH PRESS OF THE SCROLL KEY DISPLAY THE NEXT ERROR CODE. |
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| Clear History Counters | |
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| 1. PRESS & HOLD THE ENTER KEY AND THE SCROLL KEY FOR ~ 6 SECONDS |
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ERROR |
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CODE | Problem |
| Action |
1 | FRONT PANEL BUTTON STUCK FOR MORE THAN 20 SECONDS |
| CONTINUE TO MONITOR FOR "OPEN" (UNSTUCK) SWITCH. DO NOT PROCESS SWITCH INPUT. |
2 | INPUT VOLTAGE OUT OF SPECIFICATION (103 - 127 / 187 - 253) |
| UNIT STOPS, OPEN ALL RELAYS UNTIL VOLTAGE IS BACK WITHIN SPECS THEN RESUME OPERATION. |
3 | INDOOR TEMPERATURE SENSOR IS OPEN OR SHORTED |
| UNIT DEFAULTS TO 75°F IN COOLING OR 68°F IN HEATING AND WILL CONTINUE TO OPERATE. |
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| THE UNIT'S CONTROL BOARD DEFAULTS 40°F. IT WILL OVERRIDE THE SENSOR AND THE UNIT WILL |
4 | INDOOR COIL TEMPERATURE SENSOR IS OPEN OR SHORTED |
| CONTINUE TO OPERATE. |
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| THE UNIT DEFAULTS TO 20°F, OVERRIDING THE SENSOR. THE UNIT WILL CONTINUE TO OPERATE. |
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| USING ELEC HEAT IF AVAILABLE FOR HEATING. IF NOT AVAILABLE, IT WILL USE HEAT PUMP IF |
5 | OUTDOOR COIL TEMPERATURE SENSOR IS OPEN OR SHORTED |
| THE OUTDOOR TEMPERATURE ALLOWS. |
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| THE UNIT WILL SHUT DOWN FOR 5 MINUTES. RESUME OPERATION FOR 3 MINUTES. IF TEST FAILS 3 |
6 | OUTDOOR COIL > (GRATER THAN) 175 F |
| TIMES, THE SEVERITY IS INCREASED AND THE UNIT OPERATION IS LOCKED OUT. |
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| THE COMPRESSOR WILL TURN OFF AND THE HIGH FAN SPEED WILL RUN. WHEN COIL TEMP REACHS |
7 | INDOOR COIL < (LESS THAN) 30 F FOR 2 CONSECUTIVE MINUTES |
| 45°F THE UNIT WILL RESUME OPERATION AFTER LOCKOUT TIME. |
8 | UNIT CYCLES > (GREATER THAN) 9 TIMES PER HOUR |
| THE UNIT WILL CONTINUE TO OPERATE AND BE MONITORED. |
9 | UNIT CYCLES < (LESS THAN) 3 TIMES PER HOUR |
| THE UNIT WILL CONTINUE TO OPERATE AND BE MONITORED. |
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| ONLY USE IF ELECTRIC HEAT IS AVAILABLE. RUN HIGH SPEED AND ELECTRIC HEAT UNTIL ROOM |
10 | ROOM FREEZE PROTECTION |
| TEMP REACHES 46°F. THE UNIT WILL DISPLAY "FRZ" DURING OPERATION. LOGGED ONLY |
11 | WALLSTAT PROBLEM OR CONNECTION ISSUE |
| THE UNIT WILL NOT OPERATE. |
12 | NOT APPLICABLE |
| NOT APPLICABLE |
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| IF UNIT IS COOLING OR HEAT PUMP IS ON, SHUT DOWN COMPRESSOR. RUN HIGH FAN UNTIL |
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| SWITCH CLOSES, THEN RESUME OPERATION. THE THIRD OCCURANCE IN 1 HOUR LOCKS UNIT OUT. |
13 | HIGH PRESSURE LIMIT SWITCH IS OPEN |
| APPLICABLE TO 24K UNIT ONLY. |
14 | NOT APPLICABLE |
| NOT APPLICABLE |
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| IF INDOOR COIL TEMPERATURE IS LESS THAN AMBIENT TEMPERATURE FOR 3 MINUTES THE UNIT WILL |
15 | HEAT PUMP ERROR |
| USE ELECTRIC HEAT TO SATISFY THE HEATING DEMAND. |
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| OCCURS IF THE AMBIENT TEMPERATURE RANGE FALLS BELOW 0°F OR GREATER THAN 130°F. THE |
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| ERROR CODE WILL REMAIN ON UNTIL THE TEMPERATURE REACHES THE OPERATING RANGE AND THEN |
16 | TEMPERATURE BEYOND OPERATING LIMITS |
| THE UNIT WILL RETURN TO NORMAL OPERATION. |
17 | EQUIPMENT DOESN'T MEET MINIMUM CONFIGURATION |
| THE COMPRESSOR MUST BE ENABLED AND HAVE AT LEAST 2 FAN SPEEDS |
18 | NOT APPLICABLE |
| NOT APPLICABLE |
19 | NOT APPLICABLE |
| NOT APPLICABLE |
20 | NOT APPLICABLE |
| NOT APPLICABLE |
21 | NOT APPLICABLE |
| NOT APPLICABLE |
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| UNIT WILL USE ELECTRIC HEAT TO SATISFY HEATING DEMANDS UNTIL THE TEMPERATURE EQUALS OR |
22 | OUTDOOR COIL TEMPERATURE < 30 F FOR 2 CONSECUTIVE MINUTES | EXCEEDS 45°F. APPLICABLE FOR HEAT PUMP MODELS ONLY. | |
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| UNIT WILL RUN ACTIVE DEFROST FOR A MINIMUM OF 6 MINUTES WHEN HEAT PUMP RUN TIME IS |
23 | FROST PROTECTION |
| GREATER THAN 60 MINUTES AND OUTDOOR COIL TEMPERATURE IS 26 F OR LESS. |
24 | NOT APPLICABLE |
| NOT APPLICABLE |
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