diff --git a/shared/common.h b/shared/common.h
index bd0f77bc..ac133707 100644
--- a/shared/common.h
+++ b/shared/common.h
@@ -68,7 +68,7 @@ typedef struct {
   union {
     struct {
       uint8_t buf;
-      uint8_t enable : 1;
+      uint32_t enable : 1;
       enum packet_to_hv_cmd_type_t {
         VOLT_MODE = 0,
         CURRENT_MODE,
@@ -80,6 +80,7 @@ typedef struct {
         PHASE_180_2PH,
         PHASE_180_3PH,
       } phase_type : 3;
+      uint32_t ignore_fault_pin : 1;
     } flags;
     uint32_t padding;
   };
diff --git a/shared/f3hw.h b/shared/f3hw.h
index 62350dc3..72340bcb 100644
--- a/shared/f3hw.h
+++ b/shared/f3hw.h
@@ -3,9 +3,9 @@
 #define HV_EN_PIN GPIO_PIN_15
 #define HV_EN_PORT GPIOA
 //fault pin cannot be used, as it is sometimes reset by the iram due to 15v ripple
-//#define HV_FAULT_PIN GPIO_PIN_7
-//#define HV_FAULT_PORT GPIOB
-//#define HV_FAULT_POLARITY GPIO_PIN_RESET
+#define HV_FAULT_PIN GPIO_PIN_7
+#define HV_FAULT_PORT GPIOB
+#define HV_FAULT_POLARITY GPIO_PIN_RESET
 #define LED_PIN GPIO_PIN_8
 #define LED_PORT GPIOA
 
diff --git a/src/comps/hv.c b/src/comps/hv.c
index d58be777..9b7393a3 100644
--- a/src/comps/hv.c
+++ b/src/comps/hv.c
@@ -43,6 +43,7 @@ HAL_PIN(hv_temp);
 HAL_PIN(mot_temp);
 HAL_PIN(core_temp);
 HAL_PIN(fault);  //fault from hv
+HAL_PIN(ignore_fault_pin);
 HAL_PIN(y);
 HAL_PIN(u_fb);
 HAL_PIN(v_fb);
@@ -366,6 +367,7 @@ static void frt_func(float period, volatile void *ctx_ptr, volatile hal_pin_inst
           ctx->to_hv.packet_to_hv.q_cmd        = 0.0;
           ctx->to_hv.packet_to_hv.flags.enable = 0;
         }
+        ctx->to_hv.packet_to_hv.flags.ignore_fault_pin = PIN(ignore_fault_pin) > 0.0;
         ctx->to_hv.packet_to_hv.flags.cmd_type   = PIN(cmd_mode);
         ctx->to_hv.packet_to_hv.flags.phase_type = PIN(phase_mode);
         ctx->to_hv.packet_to_hv.pos              = pos;
@@ -485,7 +487,9 @@ static void frt_func(float period, volatile void *ctx_ptr, volatile hal_pin_inst
     }
 
     if(ctx->send_state > 1){
-      tx_size = 0;
+      if(flash_state != SLAVE_IN_APP){
+        tx_size = 0;
+      }
       ctx->send_state = 0;
     }
     ctx->send_state++;
@@ -534,7 +538,7 @@ static void nrt_func(volatile void *ctx_ptr, volatile hal_pin_inst_t *pin_ptr) {
     printf("hv_update: status: %i%%\n", (int)(100.0 * ctx->addr * 4. / (float)((uint32_t) & (_binary_obj_hvf3_hvf3_bin_size))));
     last_addr = ctx->addr;
   }
-  
+
   if(last_flash_state != flash_state) {
     switch(flash_state) {
       case SLAVE_IN_APP:
diff --git a/stm32f303/src/comps/io.c b/stm32f303/src/comps/io.c
index 63de3fd6..4988f640 100644
--- a/stm32f303/src/comps/io.c
+++ b/stm32f303/src/comps/io.c
@@ -48,6 +48,8 @@ HAL_PIN(hv_en);
 
 //fault output
 HAL_PIN(fault);
+HAL_PIN(ignore_fault_pin);
+
 
 
 volatile uint32_t adc_12_buf[6];
@@ -103,7 +105,7 @@ float r2temp(float r) {
       return (-(r - b) / (a - b) * step + i * step + start);
     }
   }
-  return (temp[ARRAY_SIZE(temp)] + step);  // TODO fix
+  return (temp[ARRAY_SIZE(temp) - 1] + step);  // TODO fix
 }
 
 static void nrt_init(volatile void *ctx_ptr, volatile hal_pin_inst_t *pin_ptr) {
@@ -241,8 +243,8 @@ static void rt_func(float period, volatile void *ctx_ptr, volatile hal_pin_inst_
       if(ctx->fault == NO_ERROR) {
 #ifdef HV_FAULT_PIN
         //read fault pin from driver
-        if(err_filter(&(ctx->fault_pin_error), 5.0, 0.01, HAL_GPIO_ReadPin(HV_FAULT_PORT, HV_FAULT_PIN) == HV_FAULT_POLARITY)) {
-          ctx->fault = HV_HV_FAULT;
+        if(PIN(ignore_fault_pin) <= 0.0 && err_filter(&(ctx->fault_pin_error), 5.0, 0.01, HAL_GPIO_ReadPin(HV_FAULT_PORT, HV_FAULT_PIN) == HV_FAULT_POLARITY)) {
+          ctx->fault = HV_FAULT_ERROR;
         }
 #endif
         //Master out enable is cleared by timer break input.
diff --git a/stm32f303/src/comps/ls.c b/stm32f303/src/comps/ls.c
index 598ed3fa..b5beae6f 100644
--- a/stm32f303/src/comps/ls.c
+++ b/stm32f303/src/comps/ls.c
@@ -43,6 +43,7 @@ HAL_PIN(hv_temp);
 HAL_PIN(mot_temp);
 HAL_PIN(core_temp);
 HAL_PIN(fault_in);  //fault code send to f4
+HAL_PIN(ignore_fault_pin);
 HAL_PIN(y);
 HAL_PIN(u_fb);
 HAL_PIN(v_fb);
@@ -214,6 +215,7 @@ static void rt_func(float period, volatile void *ctx_ptr, volatile hal_pin_inst_
       PIN(en)         = ctx->packet_to_hv.flags.enable;
       PIN(phase_mode) = ctx->packet_to_hv.flags.phase_type;
       PIN(cmd_mode)   = ctx->packet_to_hv.flags.cmd_type;
+      PIN(ignore_fault_pin) = ctx->packet_to_hv.flags.ignore_fault_pin;
       PIN(d_cmd)      = ctx->packet_to_hv.d_cmd;
       PIN(q_cmd)      = ctx->packet_to_hv.q_cmd;
       PIN(pos)        = ctx->packet_to_hv.pos;
diff --git a/stm32f303/src/main.c b/stm32f303/src/main.c
index a990d316..45308d7a 100644
--- a/stm32f303/src/main.c
+++ b/stm32f303/src/main.c
@@ -352,6 +352,7 @@ int main(void) {
   hal_parse("curpid0.en = ls0.en");
   hal_parse("curpid0.cmd_mode = ls0.cmd_mode");
   hal_parse("hv0.arr = ls0.arr");
+  hal_parse("io0.ignore_fault_pin = ls0.ignore_fault_pin");
   hal_parse("debug_level 0");
 
   // hal parse config