MuscleGrid Titan Series Inverter — All Fault Codes & Warnings

01Fault 01: Fan is locked (when inverter is off), or fan fault

Titan Series (titan) FAULT CODE 01 — Fan is locked (when inverter is off), or fan fault. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 01. What to do: Replace the fan; ensure it spins freely and is connected.

02Fault 02: Over temperature, or NTC not connected well

Titan Series (titan) FAULT CODE 02 — Over temperature, or NTC not connected well. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 02. What to do: Internal component temp over 100–120 °C — check the unit's airflow isn't blocked and ambient isn't too hot; let it cool.

03Fault 03: Battery voltage is too high (battery over-charged)

Titan Series (titan) FAULT CODE 03 — Battery voltage is too high (battery over-charged). This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 03. What to do: Check battery type/quantity match the unit's spec; if it persists, return to the repair center.

04Fault 04: Battery voltage is too low

Titan Series (titan) FAULT CODE 04 — Battery voltage is too low. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 04. What to do: Re-charge the battery; if it won't hold charge, replace it.

05Fault 05: Output short-circuited, or over-temperature detected by internal converter components

Titan Series (titan) FAULT CODE 05 — Output short-circuited, or over-temperature detected by internal converter components. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 05. What to do: Check output wiring and remove any shorted/abnormal load; ensure airflow isn't blocked.

06Fault 06: Output voltage is too high

Titan Series (titan) FAULT CODE 06 — Output voltage is too high. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 06. What to do: Output abnormal (<190 V or >260 VAC): reduce the connected load; if it persists, return to repair.

07Fault 07: Overload time-out

Titan Series (titan) FAULT CODE 07 — Overload time-out. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 07. What to do: Inverter overloaded (>105–110%) and time elapsed: switch off some equipment to reduce load. If caused by high PV derating, reduce PV modules in series.

08Fault 08: Bus voltage is too high

Titan Series (titan) FAULT CODE 08 — Bus voltage is too high. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 08. What to do: Internal components fault — return to the repair center.

09Fault 09: Bus soft-start failed

Titan Series (titan) FAULT CODE 09 — Bus soft-start failed. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 09. What to do: Internal components fault — return to the repair center.

51Fault 51: Over current or surge

Titan Series (titan) FAULT CODE 51 — Over current or surge. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 51. What to do: Restart the unit; if the error recurs, return to the repair center.

52Fault 52: Bus voltage is too low

Titan Series (titan) FAULT CODE 52 — Bus voltage is too low. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 52. What to do: Internal fault — return to the repair center.

53Fault 53: Inverter soft-start failed

Titan Series (titan) FAULT CODE 53 — Inverter soft-start failed. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 53. What to do: Internal components fault — return to the repair center.

55Fault 55: Over DC voltage in AC output (output voltage unbalanced)

Titan Series (titan) FAULT CODE 55 — Over DC voltage in AC output (output voltage unbalanced). This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 55. What to do: Return to the repair center.

57Fault 57: Current sensor failed

Titan Series (titan) FAULT CODE 57 — Current sensor failed. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 57. What to do: Internal components fault — return to the repair center.

58Fault 58: Output voltage is too low

Titan Series (titan) FAULT CODE 58 — Output voltage is too low. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 58. What to do: Output abnormal (<190 V or >260 VAC): reduce the connected load; if it persists, return to repair.

59Fault 59: PV voltage is over the limitation

Titan Series (titan) FAULT CODE 59 — PV voltage is over the limitation. This is a FAULT: steady red Fault LED, the inverter STOPS and the LCD shows fault code 59. What to do: Reduce the number of PV modules in series so PV input is within spec.

01Warning 01: Fan is locked when inverter is on

Titan Series (titan) WARNING/ALARM CODE 01 — Fan is locked when inverter is on. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: Beeps 3× every second. What to do: Check the cooling fan is connected and spinning.

02Warning 02: Over temperature

Titan Series (titan) WARNING/ALARM CODE 02 — Over temperature. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: None. What to do: Reduce load; ensure airflow isn't blocked and ambient isn't too hot.

03Warning 03: Battery is over-charged

Titan Series (titan) WARNING/ALARM CODE 03 — Battery is over-charged. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: Beeps once every second. What to do: Check the charging settings / battery spec.

04Warning 04: Low battery

Titan Series (titan) WARNING/ALARM CODE 04 — Low battery. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: Beeps once every second. What to do: Re-charge the battery, or restore mains/PV to charge it.

07Warning 07: Overload

Titan Series (titan) WARNING/ALARM CODE 07 — Overload. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: Beeps once every 0.5 second. What to do: Reduce the connected load by switching off some equipment.

10Warning 10: Output power derating

Titan Series (titan) WARNING/ALARM CODE 10 — Output power derating. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: Beeps 2× every 3 seconds. What to do: Informational — output is being derated (e.g. high PV/temperature).

15Warning 15: PV energy is low

Titan Series (titan) WARNING/ALARM CODE 15 — PV energy is low. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: Beeps 2× every 3 seconds. What to do: Informational — insufficient solar; normal at low light.

16Warning 16: High AC input (>280 VAC) during BUS soft start

Titan Series (titan) WARNING/ALARM CODE 16 — High AC input (>280 VAC) during BUS soft start. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: None. What to do: Check the incoming mains/generator voltage is within range.

Warning E9: Battery equalization in progress

Titan Series (titan) WARNING/ALARM CODE E9 — Battery equalization in progress. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: None. What to do: Informational — equalization charging is running (lead-acid only).

Warning bP: Battery is not connected

Titan Series (titan) WARNING/ALARM CODE bP — Battery is not connected. This is a WARNING (not a fault): red LED FLASHES, the inverter KEEPS RUNNING. Audible: None. What to do: Check the battery wiring/connection.

BMS code 60

Titan Series (titan) BMS CODE 60 — After a successful BMS handshake, the battery is not allowed to charge OR discharge — the inverter stops both. An informational LCD code shown for lithium batteries after a successful BMS handshake. The lithium battery's BMS is protecting itself; check the battery state / BMS and let it recover.

BMS code 61

Titan Series (titan) BMS CODE 61 — Communication lost with the battery BMS (no signal for 1 min when not connected, or comms dropped after a successful connect — buzzer beeps). An informational LCD code shown for lithium batteries after a successful BMS handshake. Check the BMS communication cable (RS485/CAN) between battery and inverter.

BMS code 62

Titan Series (titan) BMS CODE 62 — After a successful BMS handshake, the battery is not allowed to charge — charging stops. An informational LCD code shown for lithium batteries after a successful BMS handshake. BMS is blocking charge (e.g. full / protection); informational, recovers on its own.

BMS code 70

Titan Series (titan) BMS CODE 70 — After a successful BMS handshake, the battery requests charging — the inverter charges. An informational LCD code shown for lithium batteries after a successful BMS handshake. Informational — normal BMS-requested charge.

BMS code 71

Titan Series (titan) BMS CODE 71 — After a successful BMS handshake, the battery is not allowed to discharge — discharge stops. An informational LCD code shown for lithium batteries after a successful BMS handshake. BMS is blocking discharge (e.g. low SOC / protection); recovers when the BMS permits.

Troubleshooting

Titan Series (titan) TROUBLESHOOTING. Unit shuts down during startup (LCD/LEDs/buzzer on for 3 s then fully off): Battery voltage is low (<1.91 V/cell). Re-charge the battery; replace if it won't hold. | No response at all after power-on: Battery far too low (<1.4 V/cell) or the internal fuse tripped. Contact the repair center to replace the fuse; re-charge or replace the battery. | Mains present but unit runs on battery (green LED flashing): Poor AC quality, OR AC wires too thin/long, OR wrong input-voltage-range setting, OR output priority is set to 'Solar First'. Check wiring/setting; set output priority to 'Utility First' if you want grid first. | Internal relay clicks on/off repeatedly (LCD/LEDs flashing): Battery is disconnected — check the battery wires are connected well.

Parallel-system fault codes (multi-inverter installs)

Titan Series (titan) PARALLEL-SYSTEM FAULT CODES (only in multi-inverter installs): 60 = Power feedback protection | 71 = Firmware version inconsistent | 72 = Current sharing fault | 73 = Inconsistent output-voltage settings across parallel units | 80 = CAN communication fault | 81 = Host (master) loss | 82 = Synchronization loss | 83 = Battery voltage detected different between units | 84 = AC input voltage/frequency detected different between units | 85 = AC output current unbalance | 86 = AC output mode setting is different between units. Note: in a SINGLE-unit install these numbers instead carry their normal fault/BMS meaning.

Settings: Output & input

Titan Series (titan) LCD SETTING — Output & input. Enter setup: press & hold ENTER 3 s; UP/DOWN to select a program; ENTER to confirm; ESC to exit. 00 Exit setting mode (ESC). 01 Output source priority: 'SUb' = Solar first (utility supplements when solar is insufficient); 'SbU' = SBU (solar first, then battery; utility only when battery drops to the low-voltage warning or the program-12 point). 02 Max total charging current (utility+solar): default 60 A, 10 A–max, 10 A steps. 03 AC input voltage range: 'APL' Appliances (90–280 VAC, default) / 'UPS' (170–280 VAC). 09 Output frequency 50 Hz (default)/60 Hz. 10 Output voltage 220/230(default)/240 V. 08 ECO 'SdS' off(default)/'SEn' on.

Settings: Battery type & charger priority

Titan Series (titan) LCD SETTING — Battery type & charger priority. 05 Battery type: AGM(default) / FLd Flooded / USE User-Defined / LIA (LIA-protocol lithium) / PYL Pylontech / t9F Techfine / GrO Growatt / LIb (LIB-protocol lithium) / LIC (3rd-party lithium). Lithium/protocol types auto-set programs 26/27/29 (LIA also 24). 16 Charger source priority: 'CSO' Solar first / 'SNU' Solar+Utility(default) / 'OSO' Only Solar. In battery mode only solar charges.

Settings: Charging voltages

Titan Series (titan) LCD SETTING — Charging voltages. 26 Bulk/Constant-Voltage (CV) charge: 24 V-system default 28.2 V [24–30 V]; 48 V-system default 56.4 V [48–60 V]; 0.1 V steps (settable only if User-Defined). 27 Float charge: 24 V default 27.0 V; 48 V default 54.0 V. 29 Low DC cut-off: 24 V default 21.0 V [20–26 V]; 48 V default 42.0 V [40–52 V]. 11 Max utility charging current: default 30 A, 2 A then 10 A–max, 10 A steps. CV must be higher than float.

Settings: Battery switch thresholds & alarms

Titan Series (titan) LCD SETTING — Battery switch thresholds & alarms. 12 Voltage point back to utility (SBU priority): 24 V default 23.0 V [22–25.5 V, 0.5 V]; 48 V default 46 V [44–51 V, 1 V]. 13 Voltage point back to battery mode (SBU priority): 24 V 'FUL'/27.0 V [24–29 V]; 48 V 'FUL'/54 V [48–58 V]. 24 Battery low-voltage alarm: 20–27 V (24 V system) / 40–54 V (48 V system). 18 Alarm control bON(default)/bOF. 22 Beeps when primary source interrupted AON(default)/AOF. 23 Overload bypass byd(default)/byE. 25 Record fault code FEN(default)/FdS. 19 Auto-return display ESP(default)/tEP. 20 Backlight LON/LOF.

Settings: Battery equalization (lead-acid only)

Titan Series (titan) LCD SETTING — Battery equalization (lead-acid only). Only when Flooded or User-Defined in program 05. 30 Equalization EEn / EdS(default). 31 Equalization voltage: 24 V default 29.2 V [24–30 V]; 48 V default 58.4 V [48–60 V]. 33 Equalized time 60 min [5–900]. 34 Equalized timeout 120 min [5–900]. 35 Equalization interval 30 days [0–90]. 36 Equalize immediately AEn/AdS(default) (LCD shows 'E9' while active). Do NOT equalize lithium batteries.

Settings: BMS & SOC settings (lithium)

Titan Series (titan) LCD SETTING — BMS & SOC settings (lithium). 37 BMS Function Switch OFF(default)/ON. 38 Battery SOC under-lock: default 10% — if BMS SOC drops below, the inverter shuts down to protect the battery. 39 Battery SOC turn-to-AC: default 20% — in battery-priority mode, forces mains charging when SOC below. 40 Battery SOC turn-to-DC: default 95% — resumes DC/battery mode when SOC above. 41 Battery restart SOC: default 50% — at power-on, SOC must exceed this to run.

Settings: Solar, grid-tie, scheduling & time

Titan Series (titan) LCD SETTING — Solar, grid-tie, scheduling & time. 43 Solar supply priority: 'bLU' charge battery first / 'LbU' power loads first. 44 Solar feed-to-grid: 'Grd' disable / 'GtE' enable. 45 Reset PV energy Nrt(default)/rSt. 46 AC-charger start time / 47 stop time [00:00–23:00]. 48 Scheduled AC output ON / 49 OFF [00:00–23:00]. 50 Country regulations Mode1 Ind/Mode2 GEn/Mode3 SAd/Mode4 PAr(default) (feed-in V/freq ranges). 51–55 Time set min/hour/day/month/year. 56 Grid-tie current 10 A (1 A steps). 57 External CT function. 58 Mains input power 150 W [10–500 W].

Settings: Dual (second) output

Titan Series (titan) LCD SETTING — Dual (second) output. 60 Dual output L2F disable(default)/L2O use. 61 Dual-output functional voltage point: 48 V default 44.0 V / 24 V default 22.0 V — second output cuts off below this (0.1 V steps). 62 Dual-output SOC point: default 15% (lithium) — cuts off below. 63 Dual battery voltage recover: default 52 V/26 V. 64 Dual battery SOC recover: default 50%/95%. 65 Discharge time on 2nd output: disable, 0–990 min [5 min]. 66 Dual recover delay 0–60 min. 67 Output open time / 68 Output stop time [0–23].